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Add 4/7 and 21/54

4/7 + 21/54 is 121/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 54 is 378
  2. For the 1st fraction, since 7 × 54 = 378,
    4/7 = 4 × 54/7 × 54 = 216/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  4. Add the two fractions:
    216/378 + 147/378 = 216 + 147/378 = 363/378
  5. After reducing the fraction, the answer is 121/126

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