-85.01% is the change from 427 to 64
Calculation steps:
[( 64 - 427 ) ÷ 427] x 100 = -85.01%
Formula
Percentage change = [(64 - 427) / 427] x 100
Subtract the new number by the original number
64 - 427 = -363
-363 ÷ 427 = -0.8501170960187353
-0.8501170960187353 x 100 = -85.01%