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Add 21/30 and 5/7

21/30 + 5/7 is 99/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 7 is 210
  2. For the 1st fraction, since 30 × 7 = 210,
    21/30 = 21 × 7/30 × 7 = 147/210
  3. Likewise, for the 2nd fraction, since 7 × 30 = 210,
    5/7 = 5 × 30/7 × 30 = 150/210
  4. Add the two fractions:
    147/210 + 150/210 = 147 + 150/210 = 297/210
  5. After reducing the fraction, the answer is 99/70
  6. In mixed form: 129/70

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