Krystal is comparing two internet service plans. plan 1 cost $34.99 per month. plan 2 costs $ 134.97 every 3 months. if krystal plans to stay with one service plan for 1 year which should she choose? how much will she save?

Using proportions, it is found that:

She should choose plan 1.She would save $120 dollars.This question is solved by proportions, using a rule of three.

Plan 1:

$34.99 per month, how much for one year, which is 12 months?

1 month - $34.99

12 months - $x

Applying cross multiplication:

Plan 2:

$134.97 every 3 months, how much for 12 months?

3 months - $134.97

12 months - $x

Thus, she should choose plan 1.

The amount she would save is:

She would save $120 dollars.

A similar problem is given at link

Plan 1 costs $34.99 per month.
For 12 months, it would cost 12 * $34.99 = $419.88

Plan 2 cost $134.97 for 3 months.
A year is 12 months, so it has 4 periods of 3 months.
In one year, this plan would cost 4 * $134.97 = $539.88

She should choose Plan 1.
She will save $539.88 - $419.88 = $120

38 dollars is your answer.

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