Discussion
Two numbers are respectively 12% and 20% more than a third number. The ratio of the two numbers is.
Answer: D
The ratio of the two numbers is 14 : 15. Let the third number be 100. Then the numbers that are 12% and 20% more than it are 112 and 120. The ratio is \[ 112 : 120 = 14 : 15 \] on dividing both by 8. The other ratios, 22 : 15, 12 : 17 and 15 : 18, are not equal to 112 : 120 in lowest terms, which is 14 : 15.
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