-91.99% is the change from 824 to 66
Calculation steps:
[( 66 - 824 ) ÷ 824] x 100 = -91.99%
Formula
Percentage change = [(66 - 824) / 824] x 100
Subtract the new number by the original number
66 - 824 = -758
-758 ÷ 824 = -0.9199029126213593
-0.9199029126213593 x 100 = -91.99%