A certain sum of money amounts to 7/4 of itself in 6 years. What is the percent rate per annum?

Answer 1

answer=12.5%

Answer 2

Assuming simple interest is applied
P => principle
A => Amount
A = (7/4)P
Simple Interest = (3/4)P
Rate of simple interest = (3/4)P/(P*6)*100 = (1/8)*100 = 12.5%.