272.59% is the change from 135 to 503
Calculation steps:
[( 503 - 135 ) ÷ 135] x 100 = 272.59%
Formula
Percentage change = [(503 - 135) / 135] x 100
Subtract the new number by the original number
503 - 135 = 368
368 ÷ 135 = 2.725925925925926
2.725925925925926 x 100 = 272.59%