Question

At what rate per cent per annum will Rs.800 amount to Rs.1000 in 2 years?

Answer 1

p = 800
A = 1000
I = 200
S. I = pnr/100
200 = 800 * 2 * r
----------------
100
200 /8*2 = r
12. 5 % = r

Answer 2

p = 800
a = 1000
t  =2

si = a-p
1000-800 = 200
 
r= si*100 / pt
200*100 /800*2200*1 /8*2100 /825/212.5%