71.43% is the change from 28 to 48
Calculation steps:
[( 48 - 28 ) ÷ 28] x 100 = 71.43%
Formula
Percentage change = [(48 - 28) / 28] x 100
Subtract the new number by the original number
48 - 28 = 20
20 ÷ 28 = 0.7142857142857143
0.7142857142857143 x 100 = 71.43%