-80.35% is the change from 402 to 79
Calculation steps:
[( 79 - 402 ) ÷ 402] x 100 = -80.35%
Formula
Percentage change = [(79 - 402) / 402] x 100
Subtract the new number by the original number
79 - 402 = -323
-323 ÷ 402 = -0.8034825870646766
-0.8034825870646766 x 100 = -80.35%