50% is the change from 52 to 78
Calculation steps:
[( 78 - 52 ) ÷ 52] x 100 = 50%
Formula
Percentage change = [(78 - 52) / 52] x 100
Subtract the new number by the original number
78 - 52 = 26
26 ÷ 52 = 0.5
0.5 x 100 = 50%
Example