68.75% is the change from 48 to 81
Calculation steps:
[( 81 - 48 ) ÷ 48] x 100 = 68.75%
Formula
Percentage change = [(81 - 48) / 48] x 100
Subtract the new number by the original number
81 - 48 = 33
33 ÷ 48 = 0.6875
0.6875 x 100 = 68.75%
Example