330.99% is the change from 71 to 306
Calculation steps:
[( 306 - 71 ) ÷ 71] x 100 = 330.99%
Formula
Percentage change = [(306 - 71) / 71] x 100
Subtract the new number by the original number
306 - 71 = 235
235 ÷ 71 = 3.3098591549295775
3.3098591549295775 x 100 = 330.99%