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
Since the denominators are different, let’s first look for the LCD.
Express the fractions with the LCD as their denominator.
Once the denominators are the same, we can subtract the numerators to find the difference.