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Income and expenditure (or expenditure and savings) ratio, both rise by given percents: change in savings

The same question, asked 2 times: 14 Jul 2023 S4*, 25 Sep 2024 S2. Every wording below, oldest first.

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  1. Question 1

    14 Jul 2023 S4

    54
    The ratio between the monthly income and the expenditure of Vaidic is 8:58 : 5. If his income increases by 20%20\% and his expenditure increases by 30%30\%, then find the percentage increase or decrease in his monthly savings.

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  2. Question 2

    25 Sep 2024 S2

    69
    The ratio of expenditure to savings of a woman is 4 : 1. If her income and expenditure are increased by 20% and 10%, respectively, then find the percentage change in her savings.

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