Which fraction is equivalent to 57

Question

5
7
?(1 point)
Responses

1021
10
21
10 over 21

1521
15
21
15 over 21

79
7
9
7 ninths

Answer 1

To determine which fraction is equivalent to $\frac{5}{7}$, we can examine the provided options:

1. $\frac{10}{21}$
2. $\frac{15}{21}$
3. $\frac{7}{9}$

To see if any of these fractions are equivalent to $\frac{5}{7}$, we can cross-multiply:

1. For $\frac{10}{21}$:

   • Cross-multiply: $5\times 21=105$ and $7\times 10=70$ (not equal)

2. For $\frac{15}{21}$:

   • Cross-multiply: $5\times 21=105$ and $7\times 15=105$ (equal)

3. For $\frac{7}{9}$:

   • Cross-multiply: $5\times 9=45$ and $7\times 7=49$ (not equal)

The equivalent fraction to $\frac{5}{7}$ is $\frac{15}{21}$ (15 over 21).