294.37% is the change from 71 to 280
Calculation steps:
[( 280 - 71 ) ÷ 71] x 100 = 294.37%
Formula
Percentage change = [(280 - 71) / 71] x 100
Subtract the new number by the original number
280 - 71 = 209
209 ÷ 71 = 2.943661971830986
2.943661971830986 x 100 = 294.37%