39.3% is the change from 374 to 521
Calculation steps:
[( 521 - 374 ) ÷ 374] x 100 = 39.3%
Formula
Percentage change = [(521 - 374) / 374] x 100
Subtract the new number by the original number
521 - 374 = 147
147 ÷ 374 = 0.393048128342246
0.393048128342246 x 100 = 39.3%