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Add 21/63 and 18/20

21/63 + 18/20 is 37/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 20 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 63 × 20 = 1260,
    21/63 = 21 × 20/63 × 20 = 420/1260
  3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
    18/20 = 18 × 63/20 × 63 = 1134/1260
  4. Add the two like fractions:
    420/1260 + 1134/1260 = 420 + 1134/1260 = 1554/1260
  5. 1554/1260 simplified gives 37/30
  6. So, 21/63 + 18/20 = 37/30
    In mixed form: 17/30

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