55 hours 40 hours at $8 an hour equals $320 so then 15 hours which is the rest of the 55 hours at 12 an hour equals $180 and $320+$180=$500
2.5 / 18 = 6.4 / x
cross multiply
(2.5)(x) = (18)(6.4)
2.5x = 115.2
x = 115.2 / 2.5
x = 46.08 inches
<span>Divide the top of the fraction by the bottom,t<span>hen multiply your answer by 100</span></span>