notes to consolidated financial statements the table below presents information regarding group inc . 2019s regulatory capital ratios and tier 1 leverage ratio under basel i , as implemented by the federal reserve board . the information as of december 2013 reflects the revised market risk regulatory capital requirements . these changes resulted in increased regulatory capital requirements for market risk . the information as of december 2012 is prior to the implementation of these revised market risk regulatory capital requirements. .

as of december 2013: tier 1 capital: 72471
tier 2 capital: 13632
total capital: 86103
risk-weighted assets: 433226
tier 1 capital ratio: -16.7
total capital ratio: -19.9
tier 1 leverage ratio: -8.1
as of december 2012: tier 1 capital: 66977
tier 2 capital: 13429
total capital: 80406
risk-weighted assets: 399928
tier 1 capital ratio: -16.7
total capital ratio: -20.1
tier 1 leverage ratio: -7.3

revised capital framework the u.s . federal bank regulatory agencies ( agencies ) have approved revised risk-based capital and leverage ratio regulations establishing a new comprehensive capital framework for u.s . banking organizations ( revised capital framework ) . these regulations are largely based on the basel committee 2019s december 2010 final capital framework for strengthening international capital standards ( basel iii ) and also implement certain provisions of the dodd-frank act . under the revised capital framework , group inc . is an 201cadvanced approach 201d banking organization . below are the aspects of the rules that are most relevant to the firm , as an advanced approach banking organization . definition of capital and capital ratios . the revised capital framework introduced changes to the definition of regulatory capital , which , subject to transitional provisions , became effective across the firm 2019s regulatory capital and leverage ratios on january 1 , 2014 . these changes include the introduction of a new capital measure called common equity tier 1 ( cet1 ) , and the related regulatory capital ratio of cet1 to rwas ( cet1 ratio ) . in addition , the definition of tier 1 capital has been narrowed to include only cet1 and instruments such as perpetual non- cumulative preferred stock , which meet certain criteria . certain aspects of the revised requirements phase in over time . these include increases in the minimum capital ratio requirements and the introduction of new capital buffers and certain deductions from regulatory capital ( such as investments in nonconsolidated financial institutions ) . in addition , junior subordinated debt issued to trusts is being phased out of regulatory capital . the minimum cet1 ratio is 4.0% ( 4.0 % ) as of january 1 , 2014 and will increase to 4.5% ( 4.5 % ) on january 1 , 2015 . the minimum tier 1 capital ratio increased from 4.0% ( 4.0 % ) to 5.5% ( 5.5 % ) on january 1 , 2014 and will increase to 6.0% ( 6.0 % ) beginning january 1 , 2015 . the minimum total capital ratio remains unchanged at 8.0% ( 8.0 % ) . these minimum ratios will be supplemented by a new capital conservation buffer that phases in , beginning january 1 , 2016 , in increments of 0.625% ( 0.625 % ) per year until it reaches 2.5% ( 2.5 % ) on january 1 , 2019 . the revised capital framework also introduces a new counter-cyclical capital buffer , to be imposed in the event that national supervisors deem it necessary in order to counteract excessive credit growth . risk-weighted assets . in february 2014 , the federal reserve board informed us that we have completed a satisfactory 201cparallel run , 201d as required of advanced approach banking organizations under the revised capital framework , and therefore changes to rwas will take effect beginning with the second quarter of 2014 . accordingly , the calculation of rwas in future quarters will be based on the following methodologies : 2030 during the first quarter of 2014 2014 the basel i risk-based capital framework adjusted for certain items related to existing capital deductions and the phase-in of new capital deductions ( basel i adjusted ) ; 2030 during the remaining quarters of 2014 2014 the higher of rwas computed under the basel iii advanced approach or the basel i adjusted calculation ; and 2030 beginning in the first quarter of 2015 2014 the higher of rwas computed under the basel iii advanced or standardized approach . goldman sachs 2013 annual report 191 .

Questions:
what was the amount of tier 1 capital as of december 2013?
and as of december 2012?
what was the difference between these two values?
and as a percentage of the original value?

Answers:
72471
66977
5494
8%