-33.91% is the change from 979 to 647
Calculation steps:
[( 647 - 979 ) ÷ 979] x 100 = -33.91%
Formula
Percentage change = [(647 - 979) / 979] x 100
Subtract the new number by the original number
647 - 979 = -332
-332 ÷ 979 = -0.3391215526046987
-0.3391215526046987 x 100 = -33.91%