Question

find the sums which become 19320 upon increase by 15%

Answer 1

Amount = Rs. 19320

Let Principal = Rs. x

Rate of Interest = 15%

S.I. = 15/100x

Principal= Amount - Interest

Rs. x = Rs. 19320 - (15/100x)

Rs. x + (15/100x) = Rs.19320

Rs.(100/100x) + Rs.(15/100x) = Rs.19320

Rs.(115/100x) = Rs.19320

Rs.x = Rs. 19320 / (115/100)

Rs. x = Rs. 19320 x 100/115

Rs. x = Rs. 16800

Principal = Rs. 16800 i.e. the sum which on increasing by 15% of itself becomes Rs. 19320

Answer 2

=19320×115/100
=966×23
=22218