Question

1. The amount Rs 2100 became Rs 2352 in 2 years at simple interest. If the interest rate is decreased by 1%, what is the new interest?

2. My grandfather was 9 times older than me 16 years ago. He will be 3 times of my age 8 years from now. Eight years ago, the ratio of my age to that of my grandfather was?
Pls help me
At interest rate x,
2100(1+2x) = 2352
x = (2352/2100 - 1)/2 = .06 = 6%
so, x-1 = 5%

My age=m
grandfather is g
(g-16) = 9(m-16)
(g+8) = 3(m+8)

so, solve for m and g, and you want

(m-8)/(g-8) = ?

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