395.29% is the change from 85 to 421
Calculation steps:
[( 421 - 85 ) ÷ 85] x 100 = 395.29%
Formula
Percentage change = [(421 - 85) / 85] x 100
Subtract the new number by the original number
421 - 85 = 336
336 ÷ 85 = 3.9529411764705884
3.9529411764705884 x 100 = 395.29%