607.69% is the change from 91 to 644
Calculation steps:
[( 644 - 91 ) ÷ 91] x 100 = 607.69%
Formula
Percentage change = [(644 - 91) / 91] x 100
Subtract the new number by the original number
644 - 91 = 553
553 ÷ 91 = 6.076923076923077
6.076923076923077 x 100 = 607.69%