-86.4% is the change from 647 to 88
Calculation steps:
[( 88 - 647 ) ÷ 647] x 100 = -86.4%
Formula
Percentage change = [(88 - 647) / 647] x 100
Subtract the new number by the original number
88 - 647 = -559
-559 ÷ 647 = -0.8639876352395672
-0.8639876352395672 x 100 = -86.4%