75.5% is the change from 400 to 702
Calculation steps:
[( 702 - 400 ) ÷ 400] x 100 = 75.5%
Formula
Percentage change = [(702 - 400) / 400] x 100
Subtract the new number by the original number
702 - 400 = 302
302 ÷ 400 = 0.755
0.755 x 100 = 75.5%
Example