875.76% is the change from 66 to 644
Calculation steps:
[( 644 - 66 ) ÷ 66] x 100 = 875.76%
Formula
Percentage change = [(644 - 66) / 66] x 100
Subtract the new number by the original number
644 - 66 = 578
578 ÷ 66 = 8.757575757575758
8.757575757575758 x 100 = 875.76%