830.23% is the change from 43 to 400
Calculation steps:
[( 400 - 43 ) ÷ 43] x 100 = 830.23%
Formula
Percentage change = [(400 - 43) / 43] x 100
Subtract the new number by the original number
400 - 43 = 357
357 ÷ 43 = 8.30232558139535
8.30232558139535 x 100 = 830.23%