-78.14% is the change from 668 to 146
Calculation steps:
[( 146 - 668 ) ÷ 668] x 100 = -78.14%
Formula
Percentage change = [(146 - 668) / 668] x 100
Subtract the new number by the original number
146 - 668 = -522
-522 ÷ 668 = -0.781437125748503
-0.781437125748503 x 100 = -78.14%