250% is the change from 200 to 700
Calculation steps:
[( 700 - 200 ) ÷ 200] x 100 = 250%
Formula
Percentage change = [(700 - 200) / 200] x 100
Subtract the new number by the original number
700 - 200 = 500
500 ÷ 200 = 2.5
2.5 x 100 = 250%
Example