20.43% is the change from 421 to 507
Calculation steps:
[( 507 - 421 ) ÷ 421] x 100 = 20.43%
Formula
Percentage change = [(507 - 421) / 421] x 100
Subtract the new number by the original number
507 - 421 = 86
86 ÷ 421 = 0.2042755344418052
0.2042755344418052 x 100 = 20.43%