Question
Z spends 60% of his salary and saves the remaining.
After his salary is increased by 30%, he saves 55% of the increased amount besides the amount he used to save earlier. What will be the percentage change in his monthly savings?Solution
ATQ,
Z's savings increase because: Initially, he saves 40% of his salary. After a 30% salary increase, his new salary becomes 1.3S. He saves 55% of the increased amount (0.3S) in addition to his old savings. New savings = 0.4S + 0.165S = 0.565S. Percentage change in savings: 
Thus, his savings increase by 41.25% .
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