283.7% is the change from 135 to 518
Calculation steps:
[( 518 - 135 ) ÷ 135] x 100 = 283.7%
Formula
Percentage change = [(518 - 135) / 135] x 100
Subtract the new number by the original number
518 - 135 = 383
383 ÷ 135 = 2.837037037037037
2.837037037037037 x 100 = 283.7%