Which is a valid proportion 1. 3/4 = 21/28 2. 5/6 = 29/30 3. 4/7 = 16/49 4. 2/5 = 12/15

1) 3/4 * 7/7= 21/28
YES

2) 5/6 * 5.8/5= 29/30
NO

3) 4/7 * 4/7= 16/49
NO

4) 2/5 * 6/3 = 12/15
NO

The only fraction that can be multiplied by the SAME numerator and denominator to equal the fraction on the right side of the equal sign is #1) 3/4= 21/28. So #1 is a valid proportion.

ANSWER: 1) 3/4= 21/28

Hope this helps! :)