2800% is the change from 3 to 87
Calculation steps:
[( 87 - 3 ) ÷ 3] x 100 = 2800%
Formula
Percentage change = [(87 - 3) / 3] x 100
Subtract the new number by the original number
87 - 3 = 84
84 ÷ 3 = 28
28 x 100 = 2800%
Example