200% is the change from 28 to 84
Calculation steps:
[( 84 - 28 ) ÷ 28] x 100 = 200%
Formula
Percentage change = [(84 - 28) / 28] x 100
Subtract the new number by the original number
84 - 28 = 56
56 ÷ 28 = 2
2 x 100 = 200%
Example