-10.11% is the change from 979 to 880
Calculation steps:
[( 880 - 979 ) ÷ 979] x 100 = -10.11%
Formula
Percentage change = [(880 - 979) / 979] x 100
Subtract the new number by the original number
880 - 979 = -99
-99 ÷ 979 = -0.10112359550561797
-0.10112359550561797 x 100 = -10.11%