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Add 42/56 and 70/90

42/56 + 70/90 is 55/36.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 90 is 2520
  2. For the 1st fraction, since 56 × 45 = 2520,
    42/56 = 42 × 45/56 × 45 = 1890/2520
  3. Likewise, for the 2nd fraction, since 90 × 28 = 2520,
    70/90 = 70 × 28/90 × 28 = 1960/2520
  4. Add the two fractions:
    1890/2520 + 1960/2520 = 1890 + 1960/2520 = 3850/2520
  5. 3850/2520 simplified gives 55/36
  6. So, 42/56 + 70/90 = 55/36
    In mixed form: 119/36

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