68.75% is the change from 128 to 216
Calculation steps:
[( 216 - 128 ) ÷ 128] x 100 = 68.75%
Formula
Percentage change = [(216 - 128) / 128] x 100
Subtract the new number by the original number
216 - 128 = 88
88 ÷ 128 = 0.6875
0.6875 x 100 = 68.75%
Example