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How to Put Fraction in Calculator Ti-84

Reviewed by Calculator Editorial Team

Entering and working with fractions on the TI-84 calculator is straightforward once you understand the proper methods. This guide will walk you through the process step-by-step, ensuring you can accurately input and manipulate fractions for your math problems.

Basic Fraction Entry

To enter a fraction on your TI-84 calculator, follow these steps:

  1. Press the MATH key.
  2. Use the arrow keys to highlight the Frac option.
  3. Press ENTER to select the fraction template.
  4. Enter the numerator (top number) of your fraction.
  5. Press the / key (located near the MATH key).
  6. Enter the denominator (bottom number) of your fraction.
  7. Press ENTER to complete the fraction entry.

Example: To enter 3/4, you would press MATH → Frac → 3 → / → 4 → ENTER.

Working with Mixed Numbers

Mixed numbers (a combination of a whole number and a fraction) can be entered in two ways:

Method 1: Using the Mixed Number Template

  1. Press the MATH key.
  2. Use the arrow keys to highlight the Mixed # option.
  3. Press ENTER to select the mixed number template.
  4. Enter the whole number part.
  5. Press the / key.
  6. Enter the numerator of the fractional part.
  7. Press the / key again.
  8. Enter the denominator of the fractional part.
  9. Press ENTER to complete the mixed number.

Method 2: Adding Whole Number and Fraction

  1. Enter the whole number first.
  2. Press the + key.
  3. Follow the basic fraction entry method to add the fractional part.

Example: For 2 3/4, you could use Method 1 (MATH → Mixed # → 2 → / → 3 → / → 4 → ENTER) or Method 2 (2 + 3/4).

Performing Calculations with Fractions

Once you've entered your fractions, you can perform various calculations:

Addition and Subtraction

Use the + and - keys between fractions. The calculator will automatically find a common denominator if needed.

Multiplication

Use the × key. Multiply the numerators together and the denominators together.

Division

Use the / key. Multiply the first fraction by the reciprocal of the second fraction.

Example Calculation: (3/4) × (2/3) = (3×2)/(4×3) = 6/12 = 1/2

Converting Fractions to Decimals

To convert a fraction to a decimal:

  1. Enter the fraction as described above.
  2. Press the ÷ key.
  3. Enter the denominator of your fraction.
  4. Press ENTER to see the decimal result.

Example: To convert 3/4 to a decimal, enter 3/4 ÷ 4 = 0.75.

Troubleshooting Common Issues

Fraction Doesn't Display Properly

If your fraction doesn't display correctly, try these solutions:

  • Ensure you've pressed ENTER after entering the denominator.
  • Check that you're using the correct fraction template (MATH → Frac).
  • Make sure your calculator is in the correct mode (Math → Frac).

Calculator Shows Error

Common errors when working with fractions include:

  • ERROR: DIVIDE BY 0 - You've entered a denominator of 0.
  • ERROR: SYNTAX - Check your fraction format and ensure all steps are complete.

Frequently Asked Questions

How do I simplify fractions on the TI-84?
The TI-84 automatically simplifies fractions when you press ENTER. If you need to simplify manually, you can divide both the numerator and denominator by their greatest common divisor (GCD).
Can I use fractions in equations and functions?
Yes, you can use fractions in equations and functions. Simply enter the fraction as part of your equation or function definition.
How do I store fractions in memory?
To store a fraction in memory, enter the fraction and then press STO → followed by the variable you want to store it in (e.g., A, B, etc.).
What if I make a mistake while entering a fraction?
Press the 2nd key followed by the DEL key to delete the last entry. You can also press CLEAR to start over.