How to calculate fractions with different denominators

Want to find out how to calculate fractions with different denominators? We've provided a step-by-step guide of how to calculate fractions with different denominators to teach you everything you need to know.

How to calculate fractions with different denominators

Step 1: Determine the least common denominator

If the fractions have different denominators, determine the least common denominator (LCD) shared by the fractions.

Step 2: Convert to the same denominator

Express the fractions so that they share the same denominator using the LCD.

Step 3: Add or subtract the numerators

Once the denominator of the fractions are the same, add or subtract the given numerators.

Step 4: Simplify the fractions

Cancel out common factors and simplify the fractions if needed.

Examples of calculating fractions with different denominators

Q1) Perform the indicated operations

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Since the denominators are different, let’s first look for the LCD.

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Express the fractions with the LCD as their denominator.

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Once the denominators are the same, we can subtract the numerators to find the difference.

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