304.23% is the change from 71 to 287
Calculation steps:
[( 287 - 71 ) ÷ 71] x 100 = 304.23%
Formula
Percentage change = [(287 - 71) / 71] x 100
Subtract the new number by the original number
287 - 71 = 216
216 ÷ 71 = 3.0422535211267605
3.0422535211267605 x 100 = 304.23%