80.95% is the change from 21 to 38
Calculation steps:
[( 38 - 21 ) ÷ 21] x 100 = 80.95%
Formula
Percentage change = [(38 - 21) / 21] x 100
Subtract the new number by the original number
38 - 21 = 17
17 ÷ 21 = 0.8095238095238095
0.8095238095238095 x 100 = 80.95%