Question

Exactly 65% of the marbles in a bag are black. If there are 20 marbles in the bag, how many are black?

Answer 1

We need to calculate the value that represents 65% of 20 marbles. To do that, we have to multiply the fraction that is equivalent to 65% and 20. This is done below:

`\begin{gathered} \text{black}=65\text{ \%}\cdot20 \\ \text{black}=(65)/(100)\cdot20 \\ \text{black}=13 \end{gathered}`

13 marbles are black.