8500% is the change from 4 to 344
Calculation steps:
[( 344 - 4 ) ÷ 4] x 100 = 8500%
Formula
Percentage change = [(344 - 4) / 4] x 100
Subtract the new number by the original number
344 - 4 = 340
340 ÷ 4 = 85
85 x 100 = 8500%
Example