5 .
other current assets other current assets consisted of the following at december 31: .

( in millions )
2010
2009
refundable income tax
$ 61.0
$ 24.1
net deferred income taxes ( note 14 )
18.3
23.8
prepaid technology license and maintenance contracts
18.0
17.0
forward contract receivable ( note 20 )
11.8
27.3
receivables from brokers
11.2
8.8
other prepaid expenses
9.6
13.5
prepaid insurance
6.3
7.0
cboe exercise rights privilege
2014
39.8
other
9.9
4.3
total
$ 146.1
$ 165.6

6 .
performance bonds and guaranty fund contributions cme clears and guarantees the settlement of cme , cbot and nymex contracts traded in their respective markets .
in its guarantor role , cme has precisely equal and offsetting claims to and from clearing firms on opposite sides of each contract , standing as an intermediary on every contract cleared .
clearing firm positions are combined to create a single portfolio for each clearing firm 2019s regulated and non-regulated accounts with cme for which performance bond and guaranty fund requirements are calculated .
to the extent that funds are not otherwise available to satisfy an obligation under the applicable contract , cme bears counterparty credit risk in the event that future market movements create conditions that could lead to clearing firms failing to meet their obligations to cme .
cme reduces its exposure through a risk management program that includes initial and ongoing financial standards for designation as a clearing firm , performance bond requirements and mandatory guaranty fund contributions .
each clearing firm is required to deposit and maintain balances in the form of cash , u.s .
government securities , bank letters of credit or other approved investments to satisfy performance bond and guaranty fund requirements .
all obligations and non-cash deposits are marked to market on a daily basis .
in addition , the rules and regulations of cbot require certain minimum financial requirements for delivery of physical commodities , maintenance of capital requirements and deposits on pending arbitration matters .
to satisfy these requirements , cbot clearing firms have deposited cash , u.s .
treasury securities and letters of credit .
cme marks-to-market open positions at least twice a day , and requires payment from clearing firms whose positions have lost value and makes payments to clearing firms whose positions have gained value .
for select product offerings within newer markets , positions are marked-to-market once daily , with the capability to mark-to-market more frequently as market conditions warrant .
under the extremely unlikely scenario of simultaneous default by every clearing firm who has open positions with unrealized losses , the maximum exposure related to cme 2019s guarantee would be one half day of changes in fair value of all open positions , before considering cme 2019s ability to access defaulting clearing firms 2019 performance bond and guaranty fund balances as well as other available resources .
during 2010 , cme transferred an average of approximately $ 2.4 billion a day through its clearing system for settlement from clearing firms whose positions had lost value to clearing firms whose positions had gained value .
cme reduces its guarantee exposure through initial and maintenance performance bond requirements and mandatory guaranty fund contributions .
the company believes that the guarantee liability is immaterial and therefore has not recorded any liability at december 31 , 2010. .

Question: what was the percentage change in receivables from brokers with in other current assets from 2009 to 2010?
Answer: 29%
Calculation: subtract(11.2, 8.8), divide(#0, 8.8)