312.26% is the change from 155 to 639
Calculation steps:
[( 639 - 155 ) ÷ 155] x 100 = 312.26%
Formula
Percentage change = [(639 - 155) / 155] x 100
Subtract the new number by the original number
639 - 155 = 484
484 ÷ 155 = 3.1225806451612903
3.1225806451612903 x 100 = 312.26%