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Add 18/20 and 8/63

18/20 + 8/63 is 647/630.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 20 × 63 = 1260,
    18/20 = 18 × 63/20 × 63 = 1134/1260
  3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
    8/63 = 8 × 20/63 × 20 = 160/1260
  4. Add the two like fractions:
    1134/1260 + 160/1260 = 1134 + 160/1260 = 1294/1260
  5. 1294/1260 simplified gives 647/630
  6. So, 18/20 + 8/63 = 647/630
    In mixed form: 117/630

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