-88.98% is the change from 644 to 71
Calculation steps:
[( 71 - 644 ) ÷ 644] x 100 = -88.98%
Formula
Percentage change = [(71 - 644) / 644] x 100
Subtract the new number by the original number
71 - 644 = -573
-573 ÷ 644 = -0.889751552795031
-0.889751552795031 x 100 = -88.98%