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On a test, Matilda answered 12 out of the first 15 problems correctly. If this rate continues, how many of the next 25 problems will she answer correctly?

1 Answer

ma m. · Stefan V.

Nov 14, 2016

Matilda gets $20$ $20$ of the problems right.

Explanation:

Matilda answered $12$ $12$ of the $15$ $15$ problems or a ratio of $\frac{12}{15}$ $12/15$ . This gives

$\frac{12}{15} = 0.8 \cdot 100 % = 80 %$ $12/15 = 0.8 * 100% = 80%$

If she gets $80 %$ $80%$ of the next set of $25$ $25$ questions right

$25 \cdot 0.8 = 20$ $25 * 0.8 = 20$

She will get $20$ $20$ problems correct.

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