250% is the change from 28 to 98
Calculation steps:
[( 98 - 28 ) ÷ 28] x 100 = 250%
Formula
Percentage change = [(98 - 28) / 28] x 100
Subtract the new number by the original number
98 - 28 = 70
70 ÷ 28 = 2.5
2.5 x 100 = 250%
Example