286.75% is the change from 166 to 642
Calculation steps:
[( 642 - 166 ) ÷ 166] x 100 = 286.75%
Formula
Percentage change = [(642 - 166) / 166] x 100
Subtract the new number by the original number
642 - 166 = 476
476 ÷ 166 = 2.8674698795180724
2.8674698795180724 x 100 = 286.75%