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How to Put A Fractions on A Ti-84 Plus Calculator

Reviewed by Calculator Editorial Team

Working with fractions on your TI-84 Plus calculator is straightforward once you understand the proper methods. This guide will walk you through entering fractions, performing calculations with them, and converting between fraction and decimal formats.

Entering Fractions on TI-84 Plus

To enter a fraction on your TI-84 Plus calculator, you'll need to use the fraction template feature. Here's how to do it:

  1. Press the MATH key and select option 1: Frac (this is the fraction template).
  2. Press the ALPHA key to enter the numerator (top number of the fraction).
  3. Enter the numerator value (e.g., 3 for 3/4).
  4. Press the ALPHA key again to enter the denominator (bottom number of the fraction).
  5. Enter the denominator value (e.g., 4 for 3/4).
  6. Press ENTER to complete the fraction entry.

Tip: You can also enter fractions directly by typing the numerator, pressing the division symbol (/), and then typing the denominator. For example, type 3, press /, then type 4 to enter 3/4.

Example: Entering 5/8

To enter the fraction 5/8:

  1. Press MATH → 1:Frac
  2. Press ALPHA → type 5 → ENTER
  3. Press ALPHA → type 8 → ENTER

The calculator will display the fraction 5/8.

Using Fractions in Calculations

Once you've entered a fraction, you can use it in calculations just like any other number. Here are some common operations:

Adding Fractions

To add two fractions:

  1. Enter the first fraction (e.g., 1/2)
  2. Press the + key
  3. Enter the second fraction (e.g., 1/3)
  4. Press ENTER

The calculator will display the sum as a fraction (3/6) and may simplify it to 1/2.

Multiplying Fractions

To multiply two fractions:

  1. Enter the first fraction (e.g., 2/3)
  2. Press the × key
  3. Enter the second fraction (e.g., 3/4)
  4. Press ENTER

The calculator will display the product as a fraction (6/12) and may simplify it to 1/2.

Fraction multiplication formula: (a/b) × (c/d) = (a×c)/(b×d)

Converting Fractions to Decimals

To convert a fraction to a decimal on your TI-84 Plus:

  1. Enter the fraction (e.g., 3/4)
  2. Press the MATH key and select option 1: Frac
  3. Press ENTER

The calculator will display the decimal equivalent (0.75).

Example: Converting 7/8

To convert 7/8 to a decimal:

  1. Enter 7/8
  2. Press MATH → 1:Frac → ENTER

The calculator will display 0.875.

Troubleshooting Common Issues

If you're having trouble with fractions on your TI-84 Plus, try these solutions:

Fraction Doesn't Display Properly

If the fraction doesn't display correctly, make sure you've entered it properly using the fraction template or the numerator/denominator method. Check that you've pressed ENTER after each part of the fraction.

Calculator Shows Error

If you see an error message when working with fractions, it might be because:

  • You tried to divide by zero
  • The denominator is zero
  • You entered an invalid fraction format

Double-check your entries and try again.

Fraction Doesn't Simplify

If the calculator doesn't simplify a fraction, you can manually simplify it by dividing the numerator and denominator by their greatest common divisor (GCD).

Frequently Asked Questions

Can I enter mixed numbers on my TI-84 Plus?

Yes, you can enter mixed numbers by first entering the whole number, then using the fraction template for the fractional part. For example, to enter 2 1/2, type 2, then use the fraction template for 1/2.

How do I clear a fraction entry?

To clear a fraction entry, press the CLEAR key (2nd MODE) to clear the entire display, or press the DEL key to delete the last entry.

Can I store fractions in memory?

Yes, you can store fractions in memory just like any other number. Use the STO key to store a fraction in a memory location, and recall it later using the RCL key.