Question

Mudrik installed a device on his car that guaranteed to increase his gas mileage by 10%. he currently gets 30 miles per gallon. How much will the gas mileage increase after installing the device?

Answer 1

The gas mileage will increase by 3.
Proportion:
1. n/30=10/100
2. n×100=30×10(Cross multiply)
3. n100=300
4. n100/100= 300/100(Rivide both sides by 100.
5. n=3
***3+30=33***
Hope it helps!!