-77.54% is the change from 285 to 64
Calculation steps:
[( 64 - 285 ) ÷ 285] x 100 = -77.54%
Formula
Percentage change = [(64 - 285) / 285] x 100
Subtract the new number by the original number
64 - 285 = -221
-221 ÷ 285 = -0.775438596491228
-0.775438596491228 x 100 = -77.54%