37.9% is the change from 591 to 815
Calculation steps:
[( 815 - 591 ) ÷ 591] x 100 = 37.9%
Formula
Percentage change = [(815 - 591) / 591] x 100
Subtract the new number by the original number
815 - 591 = 224
224 ÷ 591 = 0.3790186125211506
0.3790186125211506 x 100 = 37.9%