550% is the change from 12 to 78
Calculation steps:
[( 78 - 12 ) ÷ 12] x 100 = 550%
Formula
Percentage change = [(78 - 12) / 12] x 100
Subtract the new number by the original number
78 - 12 = 66
66 ÷ 12 = 5.5
5.5 x 100 = 550%
Example