Someone keeps changing 

http://en.wikipedia.org/wiki/Tier_1_capital

To the wrong definition. 

Tier 1 Ratio is Tier 1 Capital / Risk Adjusted Assets (RWA). If someone deposits $10 and the bank lends out all $10 assuming a RWA of 90% then the bank would now have risk adjusted assets of $9 ($10*0.9) and it would have equity of $2 implying a ratio of $2/$9 or 22%.

This is what I have written which I know is right.

Someone keeps changing it to something else.