Divide the marked down price by the original. So this is 828.75/975=.85. Subtract that from 1 since the .85 is how much of the original price the new price is to get .15. The price markdown is 15%
Justine > Ava > Emma 12 - 7.5 = 4.5 x + (x+4.5) +(x+12) = 3x + 16.5 = 63 63-16.3 = 56.7 56.7/ 3 = 18.9 A: Emma has $ 18.9 Ava has $23.4 Justin has $30.9