685.37% is the change from 82 to 644
Calculation steps:
[( 644 - 82 ) ÷ 82] x 100 = 685.37%
Formula
Percentage change = [(644 - 82) / 82] x 100
Subtract the new number by the original number
644 - 82 = 562
562 ÷ 82 = 6.853658536585366
6.853658536585366 x 100 = 685.37%