Last year, Maria earned $312 per week. This year, her salary increased to $343 per week. What is the percent of increase?

343 - 312 = 31

100(31/312) = ________%

Round to the nearest whole percent.

I got 9.9335897436 so its 10?

Yes! :-) She got a 10% increase in salary.

To find the percent increase, we need to calculate the difference between the initial amount and the increased amount, and then express that difference as a percentage of the initial amount.

First, let's calculate the difference:

Increased amount - Initial amount = $343 - $312 = $31

Next, we need to express this difference as a percentage of the initial amount:

Percent increase = (Difference / Initial amount) * 100

Percent increase = ($31 / $312) * 100

Percent increase ≈ 9.94%

Therefore, Maria's salary increased by approximately 9.94%.