370.59% is the change from 85 to 400
Calculation steps:
[( 400 - 85 ) ÷ 85] x 100 = 370.59%
Formula
Percentage change = [(400 - 85) / 85] x 100
Subtract the new number by the original number
400 - 85 = 315
315 ÷ 85 = 3.7058823529411766
3.7058823529411766 x 100 = 370.59%