-92.7% is the change from 644 to 47
Calculation steps:
[( 47 - 644 ) ÷ 644] x 100 = -92.7%
Formula
Percentage change = [(47 - 644) / 644] x 100
Subtract the new number by the original number
47 - 644 = -597
-597 ÷ 644 = -0.9270186335403726
-0.9270186335403726 x 100 = -92.7%