Question

The ratio of boys to girls at the beach cleanup was 7:8 if there were 42boys how many girls were there

Answer 1

Let x be the number of girls at the beach. The ratio of boys to girls at the beach cleanup was 7 : 8. If there were 42 boys and x girls, you can write a proportion:

$\dfrac{42}{x}=\dfrac{7}{8}.$

Use the main property of proportion:

$42\cdot 8=7\cdot x,\\ \\x=\dfrac{42\cdot 8}{7},\\ \\x=6\cdot 8=48.$

Answer: 48 girls