2700% is the change from 3 to 84
Calculation steps:
[( 84 - 3 ) ÷ 3] x 100 = 2700%
Formula
Percentage change = [(84 - 3) / 3] x 100
Subtract the new number by the original number
84 - 3 = 81
81 ÷ 3 = 27
27 x 100 = 2700%
Example