If denominators differ, first rewrite the fractions with a common denominator (often the least common denominator).
Then you can compare by numerators (with the same denominator) and add or subtract using the rule: one denominator, add or subtract the numerators.
Common denominator — usually the LCM of the two denominators
After rewriting, compare or add/subtract numerators
Reduce the answer when possible
Comparison (visual)
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