47.08% is the change from 342 to 503
Calculation steps:
[( 503 - 342 ) ÷ 342] x 100 = 47.08%
Formula
Percentage change = [(503 - 342) / 342] x 100
Subtract the new number by the original number
503 - 342 = 161
161 ÷ 342 = 0.47076023391812866
0.47076023391812866 x 100 = 47.08%