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Add 70/84 and 63/90

70/84 + 63/90 is 23/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 90 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 84 × 15 = 1260,
    70/84 = 70 × 15/84 × 15 = 1050/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    63/90 = 63 × 14/90 × 14 = 882/1260
  4. Add the two like fractions:
    1050/1260 + 882/1260 = 1050 + 882/1260 = 1932/1260
  5. 1932/1260 simplified gives 23/15
  6. So, 70/84 + 63/90 = 23/15
    In mixed form: 18/15

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