349.3% is the change from 71 to 319
Calculation steps:
[( 319 - 71 ) ÷ 71] x 100 = 349.3%
Formula
Percentage change = [(319 - 71) / 71] x 100
Subtract the new number by the original number
319 - 71 = 248
248 ÷ 71 = 3.492957746478873
3.492957746478873 x 100 = 349.3%