-55.73% is the change from 497 to 220
Calculation steps:
[( 220 - 497 ) ÷ 497] x 100 = -55.73%
Formula
Percentage change = [(220 - 497) / 497] x 100
Subtract the new number by the original number
220 - 497 = -277
-277 ÷ 497 = -0.5573440643863179
-0.5573440643863179 x 100 = -55.73%