54.3% is the change from 337 to 520
Calculation steps:
[( 520 - 337 ) ÷ 337] x 100 = 54.3%
Formula
Percentage change = [(520 - 337) / 337] x 100
Subtract the new number by the original number
520 - 337 = 183
183 ÷ 337 = 0.543026706231454
0.543026706231454 x 100 = 54.3%