315.48% is the change from 155 to 644
Calculation steps:
[( 644 - 155 ) ÷ 155] x 100 = 315.48%
Formula
Percentage change = [(644 - 155) / 155] x 100
Subtract the new number by the original number
644 - 155 = 489
489 ÷ 155 = 3.1548387096774193
3.1548387096774193 x 100 = 315.48%