-84.08% is the change from 402 to 64
Calculation steps:
[( 64 - 402 ) ÷ 402] x 100 = -84.08%
Formula
Percentage change = [(64 - 402) / 402] x 100
Subtract the new number by the original number
64 - 402 = -338
-338 ÷ 402 = -0.8407960199004975
-0.8407960199004975 x 100 = -84.08%