-77.46% is the change from 284 to 64
Calculation steps:
[( 64 - 284 ) ÷ 284] x 100 = -77.46%
Formula
Percentage change = [(64 - 284) / 284] x 100
Subtract the new number by the original number
64 - 284 = -220
-220 ÷ 284 = -0.7746478873239436
-0.7746478873239436 x 100 = -77.46%