-76.23% is the change from 669 to 159
Calculation steps:
[( 159 - 669 ) ÷ 669] x 100 = -76.23%
Formula
Percentage change = [(159 - 669) / 669] x 100
Subtract the new number by the original number
159 - 669 = -510
-510 ÷ 669 = -0.7623318385650224
-0.7623318385650224 x 100 = -76.23%