Question

cost of an oil change $18 marked up 70% whats the answer

Answer 1

For this question, you first multiply 18 by a multiplier that increases $18 by 70%.
The multiplier is 100% add 70%, which is 170%, so 1.70.
This means you mutiply 18 by 1.70, which gives you $30.6.

Answer 2

The answer is $30.60