-64.95% is the change from 642 to 225
Calculation steps:
[( 225 - 642 ) ÷ 642] x 100 = -64.95%
Formula
Percentage change = [(225 - 642) / 642] x 100
Subtract the new number by the original number
225 - 642 = -417
-417 ÷ 642 = -0.6495327102803738
-0.6495327102803738 x 100 = -64.95%