-76.48% is the change from 642 to 151
Calculation steps:
[( 151 - 642 ) ÷ 642] x 100 = -76.48%
Formula
Percentage change = [(151 - 642) / 642] x 100
Subtract the new number by the original number
151 - 642 = -491
-491 ÷ 642 = -0.764797507788162
-0.764797507788162 x 100 = -76.48%