-81.67% is the change from 824 to 151
Calculation steps:
[( 151 - 824 ) ÷ 824] x 100 = -81.67%
Formula
Percentage change = [(151 - 824) / 824] x 100
Subtract the new number by the original number
151 - 824 = -673
-673 ÷ 824 = -0.816747572815534
-0.816747572815534 x 100 = -81.67%