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Add 21/28 and 30/35

21/28 + 30/35 is 45/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 35 is 140
  2. For the 1st fraction, since 28 × 5 = 140,
    21/28 = 21 × 5/28 × 5 = 105/140
  3. Likewise, for the 2nd fraction, since 35 × 4 = 140,
    30/35 = 30 × 4/35 × 4 = 120/140
  4. Add the two fractions:
    105/140 + 120/140 = 105 + 120/140 = 225/140
  5. After reducing the fraction, the answer is 45/28
  6. In mixed form: 117/28

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