-78.77% is the change from 650 to 138
Calculation steps:
[( 138 - 650 ) ÷ 650] x 100 = -78.77%
Formula
Percentage change = [(138 - 650) / 650] x 100
Subtract the new number by the original number
138 - 650 = -512
-512 ÷ 650 = -0.7876923076923077
-0.7876923076923077 x 100 = -78.77%