643.9% is the change from 123 to 915
Calculation steps:
[( 915 - 123 ) ÷ 123] x 100 = 643.9%
Formula
Percentage change = [(915 - 123) / 123] x 100
Subtract the new number by the original number
915 - 123 = 792
792 ÷ 123 = 6.439024390243903
6.439024390243903 x 100 = 643.9%