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Today, Reza ate 20 grapes, which was 400% as many grapes as he ate yesterday. Explain how to use equivalent ratios to find the number of grapes Reza ate yesterday.

Respuesta :

carlosego
What you must do for this case is to extract the relationship of the grapes that were eaten yesterday among the grapes that were eaten today.
 To do it, let:
 x: number of grapes that Reza ate yesterday
 (x / 20) = (100/400).
 Clearing x we have:
 x = (100/400) * (20) = 5
 answer
 the number of grapes Reza ate yesterday was 5
LuigiIsTehBest

Answer: 5 grapes.

Step-by-step explanation: Reza ate 20 grapes, which is 400% her amount yesterday. Turning the percent into a fraction/ratio would make 400/100. 4/1 is the equivalent fraction I’ll use. The equation would be 400/100 ÷ 4/1, or 400 ÷ 4 and 100 ÷ 1.  The result is 100/100. Now, divide 100 (numerator of the answer to the first equation) to 20 (number of grapes Reza are today) to get an answer of 5. Reza ate 5 grapes yesterday.

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