135.21% is the change from 284 to 668
Calculation steps:
[( 668 - 284 ) ÷ 284] x 100 = 135.21%
Formula
Percentage change = [(668 - 284) / 284] x 100
Subtract the new number by the original number
668 - 284 = 384
384 ÷ 284 = 1.352112676056338
1.352112676056338 x 100 = 135.21%