402.5% is the change from 80 to 402
Calculation steps:
[( 402 - 80 ) ÷ 80] x 100 = 402.5%
Formula
Percentage change = [(402 - 80) / 80] x 100
Subtract the new number by the original number
402 - 80 = 322
322 ÷ 80 = 4.025
4.025 x 100 = 402.5%
Example