Question : Two numbers are 10% and 25% less than a third number. By what percentage must the second number be increased to make it equal to the first number?
Option 1: 16.67%
Option 2: 20%
Option 3: 15%
Option 4: 60%
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Correct Answer: 20%
Solution : Let the third number be 100. Then, the first number is 90 and the second number is 75. So, the required percentage = $\frac{(90–75)}{75}$ × 100 = $\frac{15}{75}$ × 100 = 20% Hence, the correct answer is 20%.
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Question : Two numbers are 35% and 50% less than a third number. By what percentage must the second number be increased to make it equal to the first number?
Question : A number is first increased by 16% and then increased by 20%. The number so obtained has now decreased by 40%. The net decrease percentage in the original number is:
Question : A number is first decreased by 20%. The decreased number is then increased by 20%. The resulting number is less than the original number by 20. Then the original number is:
Question : The sum of the two numbers is 520. If the bigger number is decreased by 4% and the smaller number is increased by 12%, then the numbers obtained are equal. The smaller number is:
Question : If a number is increased by 25% and the resulting number is decreased by 25%, then the percentage increase or decrease finally is:
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