-34.12% is the change from 979 to 645
Calculation steps:
[( 645 - 979 ) ÷ 979] x 100 = -34.12%
Formula
Percentage change = [(645 - 979) / 979] x 100
Subtract the new number by the original number
645 - 979 = -334
-334 ÷ 979 = -0.3411644535240041
-0.3411644535240041 x 100 = -34.12%
Example