The amount of the money supply when the reserve rate is 5%
35,000÷0.05=700,000
The amount of the money supply when the reserve rate is 2.5%
35,000÷0.025=1,400,000
The affect that the amount of money would increase by 700000 when the reserve rate decreased from 5% to 2.5%
1,400,000−700,000=700,000
Hope it helps!