38.2% is the change from 377 to 521
Calculation steps:
[( 521 - 377 ) ÷ 377] x 100 = 38.2%
Formula
Percentage change = [(521 - 377) / 377] x 100
Subtract the new number by the original number
521 - 377 = 144
144 ÷ 377 = 0.3819628647214854
0.3819628647214854 x 100 = 38.2%