45 is what percent of 180?

Question

Turning a ratio into a percent is just simplifying a fraction and reading it off. Solve in your head. 45 is what percent of 180? Aim: under 8 seconds.

Accepted Answer

Form the ratio and simplify: \frac{45}{180} = \frac{1}{4} = 25\%. So 45 is \mathbf{25\%} of 180. The shortcut is spotting that 180 = 4 	imes 45, so the fraction is 	frac14 directly. Takeaway. "A is what percent of B" is the fraction A/B. Simplify to a known fraction (	frac14, 	frac13, 	frac15) before converting to a percent.

45 is what percent of 180?

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