Question

You are assigned some math exercises for homework.

You complete 87.5% of these before dinner.
How many do you have left to do after dinner if you completed 28 exercises before dinner?

Answer 1

Answer: 4 exercises

Explanation:

If we completed 87.5% of the math exercises before dinner, then we have completed 0.875 × total number of exercises.

Let "
`x`" be the total number of exercises.

`0.875x = 28`

Solving for
`x`, we get:

`\boxed{\begin{minipage}{4 cm}\text{\LARGE 0.875x = 28 } \\\\\\ \large $\Rightarrow$ $(0.875x)/(0.875)$ = $(28)/(0.875)$\\\\$\Rightarrow$x = 32\end{minipage}}`

Therefore, the total number of exercises is 32.

We completed 28 exercises before dinner, so we have: 32 - 28 = 4 exercises left to do after dinner.

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