-79.15% is the change from 662 to 138
Calculation steps:
[( 138 - 662 ) ÷ 662] x 100 = -79.15%
Formula
Percentage change = [(138 - 662) / 662] x 100
Subtract the new number by the original number
138 - 662 = -524
-524 ÷ 662 = -0.7915407854984894
-0.7915407854984894 x 100 = -79.15%