Equivalent ratios are very similar to equivalent fractions - ratios just can't be written as mixed numbers because it's comparing two different things instead of showing a part of a whole.
Identify whether the following problems are equivalent ratios or not. Correct the ratio so that it is equivalent if it is not. Explain why they are equivalent.
1) 5 plates for 2 bowls and 10 plates and 6 bowls
2) 2 boys: 3 girls and 6 boys: 9 girls
3) 4 blue blocks to 6 red blocks and 12 blue blocks to 18 red blocks
4) 3 socks to 4 shoes and 12 socks to 9 shoes