A man gave 25% to wife, 20% of remainder to son, 25% of remainder to daughter, rest Rs. 9000 to charity. Total amount: MCQ with Answer and Explanation

Explanation:
Let income = 100, exp = 50, sav = 50. New income = 150, exp = 60, sav = 90. Increase = 40 on 50 = 80%.

Explanation:
Let income = 100. Exp = 80. Sav = 20. New income = 130. New Exp = 80 * 1.2 = 96. New Sav = 130 - 96 = 34. Increase = 14. % Increase = (14 / 20) * 100 = 70%.

Explanation:
Let the number be x. x * 0.90 = 90. x = 90 / 0.90 = 100.