Answer:

25/3%

Step-by-step explanation:

let rate of interest be x%

I=P×R×T100

750=4500⋅R⋅2100

R=750⋅1004500⋅2=75090

=759=253

interest of 2 yrs =750rs

interest of 1 year =7502=375rs

interest = x%of principal amount

=4500×x100=45x

45x=375

x=37545

x=253

Rate of interest = 25/3%