-91.45% is the change from 819 to 70
Calculation steps:
[( 70 - 819 ) ÷ 819] x 100 = -91.45%
Formula
Percentage change = [(70 - 819) / 819] x 100
Subtract the new number by the original number
70 - 819 = -749
-749 ÷ 819 = -0.9145299145299145
-0.9145299145299145 x 100 = -91.45%