9950% is the change from 4 to 402
Calculation steps:
[( 402 - 4 ) ÷ 4] x 100 = 9950%
Formula
Percentage change = [(402 - 4) / 4] x 100
Subtract the new number by the original number
402 - 4 = 398
398 ÷ 4 = 99.5
99.5 x 100 = 9950%
Example