When is percent of change is used in the real world

Any type of business or marketing company may use percent of change to determine what percent of a product has been sold. Anyone may use it to determine how much of something was given or used

any type of test is most likely graded with a percent.

Step-by-step explanation:

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total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are