-19.88% is the change from 669 to 536
Calculation steps:
[( 536 - 669 ) ÷ 669] x 100 = -19.88%
Formula
Percentage change = [(536 - 669) / 669] x 100
Subtract the new number by the original number
536 - 669 = -133
-133 ÷ 669 = -0.19880418535127056
-0.19880418535127056 x 100 = -19.88%