254.23% is the change from 142 to 503
Calculation steps:
[( 503 - 142 ) ÷ 142] x 100 = 254.23%
Formula
Percentage change = [(503 - 142) / 142] x 100
Subtract the new number by the original number
503 - 142 = 361
361 ÷ 142 = 2.5422535211267605
2.5422535211267605 x 100 = 254.23%