Question

Which ratios form a proportion?

4/10 and 10/25
3/5 and 9/25
4/11 and 6/13
4/9 and 9/4​

Answer 1

4/10 and 10/25 ok

3/5 and 9/25 not ok

4/11 and 6/13 not ok

4/9 and 9/4​ not ok

Explanation: