Periodic Cost

A periodic cost is something you pay for over and over again instead of just once. This is for things like a water bill or a magazine subscription. Usually you pay either once per month or once per year.
It can be useful to convert between a monthly cost and a yearly cost to compare two periodic costs. For example, a magazine subscription is $10 per month. To calculate how much you would pay every year, do the following: 
monthly cost = $10
yearly cost  = $10 × 12 = $120
Now let's say that magazine subscription is $90 per year. To calculate how much you would pay every month, do the following: 
yearly cost  = $90
monthly cost = $90 ÷ 12 = $7.50

Exercise 1 of 6

An internet provider is $50 per month. How much would you pay every year?

Exercise 2 of 6

A cell phone plan is $40 per month. How much would you pay every year?

Exercise 3 of 6

A car insurance policy is $945 per year. How much would you pay every month? In the address bar, use / to divide.

Exercise 4 of 6

A home insurance policy is $1,383 per year. How much would you pay every month?

Exercise 5 of 6

A video streaming service is $14 per month, but you can get a yearly plan for $140. How much would you save per year with the yearly plan?

Exercise 6 of 6

A gym membership is $10 per month, but you can get a yearly membership for $99. How much would you save per month with the yearly membership?

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