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7 16 X 3 15 Fraction Calculator

Reviewed by Calculator Editorial Team

Multiplying fractions is a fundamental math operation that appears in many real-world problems. This calculator helps you multiply 7/16 by 3/15 quickly and accurately. Learn how to solve fraction multiplication step by step with our guide.

How to Multiply Fractions

Multiplying fractions follows a simple rule: multiply the numerators together and multiply the denominators together. The result is a new fraction that can be simplified if needed.

Fraction Multiplication Formula

(a/b) × (c/d) = (a × c) / (b × d)

Steps to Multiply Fractions

  1. Identify the numerators and denominators of both fractions.
  2. Multiply the numerators together to get the new numerator.
  3. Multiply the denominators together to get the new denominator.
  4. Write the result as a new fraction.
  5. Simplify the fraction if possible by dividing numerator and denominator by their greatest common divisor (GCD).

For example, multiplying 1/2 by 3/4 would give you (1×3)/(2×4) = 3/8, which is already in simplest form.

Step-by-Step Example

Let's solve 7/16 × 3/15 step by step.

  1. Identify the numerators and denominators:
    • First fraction: numerator = 7, denominator = 16
    • Second fraction: numerator = 3, denominator = 15
  2. Multiply the numerators: 7 × 3 = 21
  3. Multiply the denominators: 16 × 15 = 240
  4. Combine the results: 21/240
  5. Simplify the fraction:
    • Find the GCD of 21 and 240, which is 3
    • Divide numerator and denominator by 3: 21÷3 = 7, 240÷3 = 80
    • Simplified result: 7/80

The simplified form of 7/16 × 3/15 is 7/80.

Common Mistakes When Multiplying Fractions

When working with fractions, several common mistakes can lead to incorrect results:

  • Adding instead of multiplying: Remember that multiplication is the operation needed, not addition.
  • Forgetting to simplify: Always check if the resulting fraction can be simplified.
  • Incorrectly multiplying numerators and denominators: Make sure to multiply numerators together and denominators together.
  • Miscounting the decimal places: When converting fractions to decimals, ensure you've multiplied correctly.

Double-checking each step helps prevent these errors and ensures accurate results.

FAQ

How do I multiply mixed numbers?

To multiply mixed numbers, first convert them to improper fractions, then multiply as usual. For example, to multiply 1 1/2 by 2 1/3:

  1. Convert to improper fractions: 3/2 × 7/3
  2. Multiply: (3×7)/(2×3) = 21/6
  3. Simplify: 7/2 or 3 1/2

What if the denominator is zero?

Division by zero is undefined in mathematics. If you get a denominator of zero after multiplying, it means the operation is not possible.

How do I convert a fraction to a decimal?

To convert a fraction to a decimal, divide the numerator by the denominator. For example, 7/80 becomes 0.0875 when divided.