-91.5% is the change from 824 to 70
Calculation steps:
[( 70 - 824 ) ÷ 824] x 100 = -91.5%
Formula
Percentage change = [(70 - 824) / 824] x 100
Subtract the new number by the original number
70 - 824 = -754
-754 ÷ 824 = -0.9150485436893204
-0.9150485436893204 x 100 = -91.5%