Answer:
*
=
![(15)/(21)](https://img.qammunity.org/2021/formulas/mathematics/high-school/pz5c6m1qlm8x7jity41dzz4pbi0s28b7a8.png)
Explanation:
To get an equivalent fraction, we multiply by a fraction that is equal to one. The purpose is to alter the denominator of the fraction. To get from a denominator of 7 to 21 we multiply by 3. Therefore we will multiply 5/7 by 3/3 to get the new equivalent fraction with a denominator of 21.