Four friends have dinner and bill comes to 85.78. They leave an 18 percent tip. What is the total amount of their bill.
2 answers:
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The number of stamps and the cost are illustrations of unit rates
40 stamps would cost $22
The cost of 15 postage stamps is $8.25
Start by calculating the unit rate of the stamps.
So, the number of stamps for $22 is calculated by dividing $22 by the unit rate.
So, we have:
Hence, 40 stamps would cost $22
Read more about unit rates at:
hope you found it helpful.
