Mathematics
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WHICH IS DIFFERENT? FIND "BOTH" ANSWERS. *What number is 20% of 55? *55 is 20% of what number? *20% of 55 is what number? *0.2×55 is what number?

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Kip

Lets group equivalent questions, and answer them afterwards: *What number is 20% of 55? *20% of 55 is what number? *0.2×55 is what number? These questions are equivalent. We can calculate the 20% of 55 by multiplying them, take into account that 20% = 20 out of 100 = 20/100, so we have (20%)(55) = (20/100)(55) = (1/5)(55) = 11 hence, 11 is the 20% of 55 It is also equivalent to 0.2x55 because 20% = 20/100 = 2/10 = 0.2, hence we just need to multiply. *55 is 20% of what number? we need to find a number x such that when it is multiplied by 20% give us as result 55, take into account that 20% = 20 out of hundred = 20/100 = 1/5, so we have (1/5)x = 55 solving for x: x = 5*55 x = 275 so, 55 is the 20% of 275

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