-97.61% is the change from 669 to 16
Calculation steps:
[( 16 - 669 ) ÷ 669] x 100 = -97.61%
Formula
Percentage change = [(16 - 669) / 669] x 100
Subtract the new number by the original number
16 - 669 = -653
-653 ÷ 669 = -0.976083707025411
-0.976083707025411 x 100 = -97.61%