50% is the change from 102 to 153
Calculation steps:
[( 153 - 102 ) ÷ 102] x 100 = 50%
Formula
Percentage change = [(153 - 102) / 102] x 100
Subtract the new number by the original number
153 - 102 = 51
51 ÷ 102 = 0.5
0.5 x 100 = 50%
Example