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negative*negative=positive negative/positive=negative negative\negative=positve negative-positive=change the sign to a plus and then change the number after the sign and get your answer negative +positive=which ever numbr is bigger minus positive+positive=positive
the answer of negative 4 minus positive 21 is positive 25 because you leave the negative 4 as is, change the minus to a plus, and change positive 21 to negative 21. (Leave Change Change)
If the percent of change is negative, then it is wrong.
you have to do keep change change keep the first number change the subtraction sign to a add and the negative to a positive
Change in the demand for a goods and the change in its price. The ratio is negative but the negative sign is usually dropped.