Question

Eliana began her pizza delivering through with 1/2 of a tank of gas in a car. When she made it back to the pizzeria, 1/10 of a tank of gas was left. how much gas did Eliana use

Answer 1

`(1)/(2)-(1)/(10)=(5)/(10)-(1)/(10)=(5-1)/(10)=(4)/(10)=(2)/(5)`

Asnwer: Eliana used 2/5 of a tank of gas