-81.4% is the change from 817 to 152
Calculation steps:
[( 152 - 817 ) ÷ 817] x 100 = -81.4%
Formula
Percentage change = [(152 - 817) / 817] x 100
Subtract the new number by the original number
152 - 817 = -665
-665 ÷ 817 = -0.813953488372093
-0.813953488372093 x 100 = -81.4%