312.3% is the change from 122 to 503
Calculation steps:
[( 503 - 122 ) ÷ 122] x 100 = 312.3%
Formula
Percentage change = [(503 - 122) / 122] x 100
Subtract the new number by the original number
503 - 122 = 381
381 ÷ 122 = 3.122950819672131
3.122950819672131 x 100 = 312.3%