The difference between compound interest of two years and compound interest of first year is Rs. 44. The rate of interest for first and second year is 14.28% and 11.11% respectively. Then find the principal.

346.50

14.28 % = \(\frac{1}{7}\), 11.11% = \(\frac{1}{9}\)

Let the Principal = 63   (LCM of 7 & 9)

According to diagram:

C.I. of first year = 9

C.I. of two years = 17

Hence,

Difference b/w C.I. of two years and C.I. of first year = 17 - 9 = 8

ATQ,

8R = 44

1R = 5.5

Principal = 63R = 63 × 5.5 = 346.50