-32.66% is the change from 992 to 668
Calculation steps:
[( 668 - 992 ) ÷ 992] x 100 = -32.66%
Formula
Percentage change = [(668 - 992) / 992] x 100
Subtract the new number by the original number
668 - 992 = -324
-324 ÷ 992 = -0.32661290322580644
-0.32661290322580644 x 100 = -32.66%