650% is the change from 12 to 90
Calculation steps:
[( 90 - 12 ) ÷ 12] x 100 = 650%
Formula
Percentage change = [(90 - 12) / 12] x 100
Subtract the new number by the original number
90 - 12 = 78
78 ÷ 12 = 6.5
6.5 x 100 = 650%
Example