Fractions Topic Index | Algebra Index | Regents Exam Prep Center

Fractions are used to represent parts of whole quantities.
The denominator of a fraction (the bottom) shows the number of equal parts in the whole.
The numerator of a fraction (the top) shows the number of parts being talked about or being used.

 A pizza is cut into 8 pieces and your friend, Matt, eats the first piece.  You can say, which says that one of the eight pieces has been eaten.

Examples:

 1 Your friend, Matt, decided to create his own pizza by combining pizzas (of the same size) with different toppings.  He put together 1/8 of a cheese pizza, 1/2 of a pepperoni pizza, and 1/3 of a sausage pizza.  As he approaches the anchovy pizza, he wonders how much he should take to complete his "new" whole pizza.  How much of the anchovy pizza should Matt pick up?

Solution:   Let x = fractional part of the anchovy pizza needed to complete the pizza.

 Matt will need to take 1/24 of the anchovy pizza to complete his varied topping pizza.  A very small slice!

2.

According to NCAA regulations, the length x, in inches, of a regulation football is:

 a.  What is the difference, in inches, between the minimum and maximum lengths of a regulation football? b.  To the nearest percent, what percent of the minimum length of a regulation football is a regulation baseball of diameter inches?

Solution:

 a.   Let d = difference between lengths b.  Let x = the percent           The answer is 27%.

 See how to use your TI-83+/84+ graphing calculator  with fractions. Click calculator.

 Topic Index | Algebra Index | Regents Exam Prep Center Created by Donna Roberts