-56.3% is the change from 643 to 281
Calculation steps:
[( 281 - 643 ) ÷ 643] x 100 = -56.3%
Formula
Percentage change = [(281 - 643) / 643] x 100
Subtract the new number by the original number
281 - 643 = -362
-362 ÷ 643 = -0.5629860031104199
-0.5629860031104199 x 100 = -56.3%