7400% is the change from 12 to 900
Calculation steps:
[( 900 - 12 ) ÷ 12] x 100 = 7400%
Formula
Percentage change = [(900 - 12) / 12] x 100
Subtract the new number by the original number
900 - 12 = 888
888 ÷ 12 = 74
74 x 100 = 7400%
Example