Question
A number is first increased by 30% and then decreased by
20%. Find the percentage increase or decrease in the original number.Solution
ATQ, Let the original number be 100n Final number = 1.3 × 0.8 × 100n = 104n Therefore, percentage increase = [(104n − 100n) ÷ 100n] × 100 = 4%
Select the number from the given options which will replace the question mark in the following series.
45, 53, ? , 126, 151, 367
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