300% is the change from 75 to 300
Calculation steps:
[( 300 - 75 ) ÷ 75] x 100 = 300%
Formula
Percentage change = [(300 - 75) / 75] x 100
Subtract the new number by the original number
300 - 75 = 225
225 ÷ 75 = 3
3 x 100 = 300%
Example