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Add 7/20 and 21/30

7/20 + 21/30 is 21/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 30 is 60
  2. For the 1st fraction, since 20 × 3 = 60,
    7/20 = 7 × 3/20 × 3 = 21/60
  3. Likewise, for the 2nd fraction, since 30 × 2 = 60,
    21/30 = 21 × 2/30 × 2 = 42/60
  4. Add the two fractions:
    21/60 + 42/60 = 21 + 42/60 = 63/60
  5. 63/60 simplified gives 21/20
  6. So, 7/20 + 21/30 = 21/20
    In mixed form: 11/20

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