Question

at what rate of simple interest a sum of money will be 9/5 itself a period of 5 years

Answer 1

Here amount is 9/5 in 5 years.

So SI is (9/5-1)=4/5 in 5 years

and Sum will be 1 before 5 years.

rate = (SI/Sum)*100=((4/5)/1)*100=80% for 5 years

rate =80/5 % for 1 year

rate is 16% per annum