-75.19% is the change from 669 to 166
Calculation steps:
[( 166 - 669 ) ÷ 669] x 100 = -75.19%
Formula
Percentage change = [(166 - 669) / 669] x 100
Subtract the new number by the original number
166 - 669 = -503
-503 ÷ 669 = -0.7518684603886397
-0.7518684603886397 x 100 = -75.19%