-9.27% is the change from 647 to 587
Calculation steps:
[( 587 - 647 ) ÷ 647] x 100 = -9.27%
Formula
Percentage change = [(587 - 647) / 647] x 100
Subtract the new number by the original number
587 - 647 = -60
-60 ÷ 647 = -0.09273570324574962
-0.09273570324574962 x 100 = -9.27%