17.85% is the change from 521 to 614
Calculation steps:
[( 614 - 521 ) ÷ 521] x 100 = 17.85%
Formula
Percentage change = [(614 - 521) / 521] x 100
Subtract the new number by the original number
614 - 521 = 93
93 ÷ 521 = 0.1785028790786948
0.1785028790786948 x 100 = 17.85%