-77.58% is the change from 669 to 150
Calculation steps:
[( 150 - 669 ) ÷ 669] x 100 = -77.58%
Formula
Percentage change = [(150 - 669) / 669] x 100
Subtract the new number by the original number
150 - 669 = -519
-519 ÷ 669 = -0.7757847533632287
-0.7757847533632287 x 100 = -77.58%