-31.66% is the change from 979 to 669
Calculation steps:
[( 669 - 979 ) ÷ 979] x 100 = -31.66%
Formula
Percentage change = [(669 - 979) / 979] x 100
Subtract the new number by the original number
669 - 979 = -310
-310 ÷ 979 = -0.3166496424923391
-0.3166496424923391 x 100 = -31.66%