423.58% is the change from 123 to 644
Calculation steps:
[( 644 - 123 ) ÷ 123] x 100 = 423.58%
Formula
Percentage change = [(644 - 123) / 123] x 100
Subtract the new number by the original number
644 - 123 = 521
521 ÷ 123 = 4.235772357723577
4.235772357723577 x 100 = 423.58%