280.28% is the change from 71 to 270
Calculation steps:
[( 270 - 71 ) ÷ 71] x 100 = 280.28%
Formula
Percentage change = [(270 - 71) / 71] x 100
Subtract the new number by the original number
270 - 71 = 199
199 ÷ 71 = 2.8028169014084505
2.8028169014084505 x 100 = 280.28%