-28.34% is the change from 307 to 220
Calculation steps:
[( 220 - 307 ) ÷ 307] x 100 = -28.34%
Formula
Percentage change = [(220 - 307) / 307] x 100
Subtract the new number by the original number
220 - 307 = -87
-87 ÷ 307 = -0.28338762214983715
-0.28338762214983715 x 100 = -28.34%