it seems very easy but i'm having problem to solve

Gas Milege

A driver wants to estimate gas milege per gallon. At 36,057.1 mi, the tank is filled with 10.7 gal. At 36,217.6 mi, the tank is filled with 11.1 gal. Find the milege per gallon. Round to the nearest tenth.

Can enyone explain step by step what should i do

Thanks