-63.17% is the change from 820 to 302
Calculation steps:
[( 302 - 820 ) ÷ 820] x 100 = -63.17%
Formula
Percentage change = [(302 - 820) / 820] x 100
Subtract the new number by the original number
302 - 820 = -518
-518 ÷ 820 = -0.6317073170731707
-0.6317073170731707 x 100 = -63.17%