Question

Karla's traditional hybrid car gets 35% fewer miles per gallon than Jeenie's solar hybrid car. If Jeenie's car gets 60 miles per gallon, how many miles per gallon does Karla's car get? Calculate Karla's car mileage in two different ways, using two different scale factors (multipliers).

Answer 1

`39\ miles/gallon`

Explanation:

Let

x------> Karla's car mileage

1) First way

we know that

100%-35%=65%=65/100=0.65

so

x=0.65(60 miles/gallon)=39 miles/gallon

2) Second way

by proportion

`(60)/(100) ((miles/gallon))/(\%) =(x)/(65) ((miles/gallon))/(\%)\\ \\x=60*65/100\\ \\x=39\ miles/gallon`