17.87% is the change from 442 to 521
Calculation steps:
[( 521 - 442 ) ÷ 442] x 100 = 17.87%
Formula
Percentage change = [(521 - 442) / 442] x 100
Subtract the new number by the original number
521 - 442 = 79
79 ÷ 442 = 0.17873303167420815
0.17873303167420815 x 100 = 17.87%