55.99% is the change from 334 to 521
Calculation steps:
[( 521 - 334 ) ÷ 334] x 100 = 55.99%
Formula
Percentage change = [(521 - 334) / 334] x 100
Subtract the new number by the original number
521 - 334 = 187
187 ÷ 334 = 0.5598802395209581
0.5598802395209581 x 100 = 55.99%