-20.44% is the change from 817 to 650
Calculation steps:
[( 650 - 817 ) ÷ 817] x 100 = -20.44%
Formula
Percentage change = [(650 - 817) / 817] x 100
Subtract the new number by the original number
650 - 817 = -167
-167 ÷ 817 = -0.204406364749082
-0.204406364749082 x 100 = -20.44%