300% is the change from 207 to 828
Calculation steps:
[( 828 - 207 ) ÷ 207] x 100 = 300%
Formula
Percentage change = [(828 - 207) / 207] x 100
Subtract the new number by the original number
828 - 207 = 621
621 ÷ 207 = 3
3 x 100 = 300%
Example