If we take 6/15 and want to make 2/a equivalent to it, we first find out what was done to 6 (the numerator) to make it a 2. The 6 was divided by 3. So we do the same for 15. 15/3=5 The 3rd fraction is 2/5. You use a similar method for the 4th fraction, b/120. Now, we find out what was done to 15 (the denominator) to make it a 120. The 15 was multiplied by 8. So we do the same for 6. 6*8=48 The 4th fraction is 48/120. For the last fraction 16/c, we use 2/5 as one numerator (16) is a multiple of the other (2). 2 was multiplied by 8 to get to 16, so we do the same for 5. 5*8=40 The last fraction is 16/40.
