30.45% is the change from 220 to 287
Calculation steps:
[( 287 - 220 ) ÷ 220] x 100 = 30.45%
Formula
Percentage change = [(287 - 220) / 220] x 100
Subtract the new number by the original number
287 - 220 = 67
67 ÷ 220 = 0.30454545454545456
0.30454545454545456 x 100 = 30.45%