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To find the number that 42 is 75% of, you can set up a proportion. Let x represent the unknown number. The proportion would be: 42 = 0.75x. To solve for x, divide both sides by 0.75, giving you x = 42 / 0.75 = 56. Therefore, 42 is 75% of 56.
21, 42, 63 and so on.
The increase from 22 to 63 is: 186.4%
63. If the daughter is 21 now and also half of her mom's age then her mom is now 42 yrs old. In 21 years her mom will be 63 (42 + 21).