# Absolute change and percentage change.

For ex- Example 1: On September 20, a gallon of gas at my usual gas station cost $1.83. On September 30, I noticed that the price had gone down to$1.65 per gallon. The absolute change in the price of gas between September 20 and September 30 is
              1.65 – 1.83 = - 0.18 dollars per gallon