48.5% is the change from 400 to 594
Calculation steps:
[( 594 - 400 ) ÷ 400] x 100 = 48.5%
Formula
Percentage change = [(594 - 400) / 400] x 100
Subtract the new number by the original number
594 - 400 = 194
194 ÷ 400 = 0.485
0.485 x 100 = 48.5%
Example