284.44% is the change from 90 to 346
Calculation steps:
[( 346 - 90 ) ÷ 90] x 100 = 284.44%
Formula
Percentage change = [(346 - 90) / 90] x 100
Subtract the new number by the original number
346 - 90 = 256
256 ÷ 90 = 2.8444444444444446
2.8444444444444446 x 100 = 284.44%