275.37% is the change from 134 to 503
Calculation steps:
[( 503 - 134 ) ÷ 134] x 100 = 275.37%
Formula
Percentage change = [(503 - 134) / 134] x 100
Subtract the new number by the original number
503 - 134 = 369
369 ÷ 134 = 2.753731343283582
2.753731343283582 x 100 = 275.37%