-61.74% is the change from 643 to 246
Calculation steps:
[( 246 - 643 ) ÷ 643] x 100 = -61.74%
Formula
Percentage change = [(246 - 643) / 643] x 100
Subtract the new number by the original number
246 - 643 = -397
-397 ÷ 643 = -0.6174183514774495
-0.6174183514774495 x 100 = -61.74%