Question 979110
increase 4 by 25%, is increase over original amount or an increase of 1.  That is 5.
5 increased by 30% is 6.5, since 1.5/5=30% or 0.30
6 increased by 50% is 3/6 increase or 9.

The ratios are 5:6.5:9
OR doubling, 10:13:18.
None of these