The price of gas fell by 10% in January. In April, the price fell again (from the new lower price) by another 20%. Gas is now $1.08. What was it originally
Let C be the original cost......and we have
[C * .90] * .80 = 1.08 simplify
.72C = 1.08 divide both sides by .72
1.08/.72 = C = $1.50
+86 
