847.62% is the change from 42 to 398
Calculation steps:
[( 398 - 42 ) ÷ 42] x 100 = 847.62%
Formula
Percentage change = [(398 - 42) / 42] x 100
Subtract the new number by the original number
398 - 42 = 356
356 ÷ 42 = 8.476190476190476
8.476190476190476 x 100 = 847.62%