378.87% is the change from 71 to 340
Calculation steps:
[( 340 - 71 ) ÷ 71] x 100 = 378.87%
Formula
Percentage change = [(340 - 71) / 71] x 100
Subtract the new number by the original number
340 - 71 = 269
269 ÷ 71 = 3.788732394366197
3.788732394366197 x 100 = 378.87%