At what rate percent per annum, compounded annually, will ₹6250 amount to ₹7290 in 2 years?

$6250\times (1+r/100{)}^2=7290$ → $(1+r/100{)}^2=7290/6250=1.1664$ → $1+r/100=1.08$ → $r=8$%. (Year by year: 6250 → 6750 → 7290.) The ₹1040 of interest is 16.64% of the sum, but that is the two-year growth, not the annual rate.