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Add 70/60 and 21/90

1st number: 1 10/60, 2nd number: 21/90

70/60 + 21/90 is 7/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 90 is 180
  2. For the 1st fraction, since 60 × 3 = 180,
    70/60 = 70 × 3/60 × 3 = 210/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    21/90 = 21 × 2/90 × 2 = 42/180
  4. Add the two fractions:
    210/180 + 42/180 = 210 + 42/180 = 252/180
  5. 252/180 simplified gives 7/5
  6. So, 70/60 + 21/90 = 7/5
    In mixed form: 12/5

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