60% is the change from 50 to 80
Calculation steps:
[( 80 - 50 ) ÷ 50] x 100 = 60%
Formula
Percentage change = [(80 - 50) / 50] x 100
Subtract the new number by the original number
80 - 50 = 30
30 ÷ 50 = 0.6
0.6 x 100 = 60%
Example