918.75% is the change from 80 to 815
Calculation steps:
[( 815 - 80 ) ÷ 80] x 100 = 918.75%
Formula
Percentage change = [(815 - 80) / 80] x 100
Subtract the new number by the original number
815 - 80 = 735
735 ÷ 80 = 9.1875
9.1875 x 100 = 918.75%
Example