200% is the change from 27 to 81
Calculation steps:
[( 81 - 27 ) ÷ 27] x 100 = 200%
Formula
Percentage change = [(81 - 27) / 27] x 100
Subtract the new number by the original number
81 - 27 = 54
54 ÷ 27 = 2
2 x 100 = 200%
Example