85% is the change from 400 to 740
Calculation steps:
[( 740 - 400 ) ÷ 400] x 100 = 85%
Formula
Percentage change = [(740 - 400) / 400] x 100
Subtract the new number by the original number
740 - 400 = 340
340 ÷ 400 = 0.85
0.85 x 100 = 85%
Example