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Add 90/70 and 15/4

1st number: 1 20/70, 2nd number: 3 3/4

90/70 + 15/4 is 141/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 4 is 140
  2. For the 1st fraction, since 70 × 2 = 140,
    90/70 = 90 × 2/70 × 2 = 180/140
  3. Likewise, for the 2nd fraction, since 4 × 35 = 140,
    15/4 = 15 × 35/4 × 35 = 525/140
  4. Add the two fractions:
    180/140 + 525/140 = 180 + 525/140 = 705/140
  5. After reducing the fraction, the answer is 141/28
  6. In mixed form: 51/28

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