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Add 70/21 and 42/90

1st number: 3 7/21, 2nd number: 42/90

70/21 + 42/90 is 19/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630
  2. For the 1st fraction, since 21 × 30 = 630,
    70/21 = 70 × 30/21 × 30 = 2100/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    42/90 = 42 × 7/90 × 7 = 294/630
  4. Add the two fractions:
    2100/630 + 294/630 = 2100 + 294/630 = 2394/630
  5. After reducing the fraction, the answer is 19/5
  6. In mixed form: 34/5

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