-93.75% is the change from 64 to 4
Calculation steps:
[( 4 - 64 ) ÷ 64] x 100 = -93.75%
Formula
Percentage change = [(4 - 64) / 64] x 100
Subtract the new number by the original number
4 - 64 = -60
-60 ÷ 64 = -0.9375
-0.9375 x 100 = -93.75%
Example