-84.3% is the change from 669 to 105
Calculation steps:
[( 105 - 669 ) ÷ 669] x 100 = -84.3%
Formula
Percentage change = [(105 - 669) / 669] x 100
Subtract the new number by the original number
105 - 669 = -564
-564 ÷ 669 = -0.8430493273542601
-0.8430493273542601 x 100 = -84.3%