Chapter 10 Math 273
Check Your Understanding
1. 100 × 10 =
2. 325 × 35 =
3. 220 ÷ 20 =
4. 1,425 ÷ 5 =
5. $15.20 × 9 =
6. 457 ÷ 3 =
7. $547.89 × 40 =
8. $546.20 ÷ 4 =
9. $10,439 × 426 =
10. 40,200 ÷ 9 =
Fractions
Fractions, decimals, and percentages are mathemati-
cal concepts that express numbers that are part of a whole
(Figure 10.3). These three concepts will be especially
important for anyone entering the healthcare fi eld to
understand. As you will recall, fractions are one or more
parts of a whole number. Fractions are written in the fol-
lowing way:
1/2 or
1
13/15 or
13
5/7 or
5
2 15 7
The number written above or before the line is called
the numerator. The number below or after the line in a frac-
tion is called the denominator. The denominator is the num-
ber of parts into which the fraction is divided. When reading fractions, you
always read the top number fi rst, followed by the bottom number.
Numerator
Denominator
Calculating Volunteer Hours and Student Loans
1. Madison is a high school senior who wants to be an LPN (licensed prac-
tical nurse). Madison’s school counselor recommends volunteering at a
hospital to observe the daily responsibilities of an LPN. The volunteer
program at the local hospital requires a commitment of 100 volunteer
hours to complete the program. If Madison volunteers for 5 hours a week,
how many weeks will it take her to complete her volunteer commitment?
2. Steven decides he wants to become an EMT. He will need a student loan
to pay for the required classes. The cost of an EMT program is $1,195
with additional fees for textbook rentals of $240. After training, he will
have to pay back the loan at $100 a month. How many months will it take
Steven to pay back the loan?
Real Life Scenario
Zern Liew/Shutterstock.com
Figure 10.3 A seven-day pill box represents a
fraction. In this image, 1/7 of the pill box is open
and 6/7 are closed.