400% is the change from 85 to 425
Calculation steps:
[( 425 - 85 ) ÷ 85] x 100 = 400%
Formula
Percentage change = [(425 - 85) / 85] x 100
Subtract the new number by the original number
425 - 85 = 340
340 ÷ 85 = 4
4 x 100 = 400%
Example