-64.85% is the change from 643 to 226
Calculation steps:
[( 226 - 643 ) ÷ 643] x 100 = -64.85%
Formula
Percentage change = [(226 - 643) / 643] x 100
Subtract the new number by the original number
226 - 643 = -417
-417 ÷ 643 = -0.6485225505443235
-0.6485225505443235 x 100 = -64.85%