-76.21% is the change from 639 to 152
Calculation steps:
[( 152 - 639 ) ÷ 639] x 100 = -76.21%
Formula
Percentage change = [(152 - 639) / 639] x 100
Subtract the new number by the original number
152 - 639 = -487
-487 ÷ 639 = -0.7621283255086072
-0.7621283255086072 x 100 = -76.21%