What three ratios are equivalent to 3/9 is it 1/3 2/3 or 3/3 or is it 1/3 1236 or 15/45 or six nights 12/15 or 18/21 or is it 5/12 9/12 or 3/12

The three ratios equivalent to 3/9 are:

1/3, 2/6, and 4/12