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Add 40/21 and 20/90

1st number: 1 19/21, 2nd number: 20/90

40/21 + 20/90 is 134/63.

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,
    40/21 = 40 × 30/21 × 30 = 1200/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    20/90 = 20 × 7/90 × 7 = 140/630
  4. Add the two fractions:
    1200/630 + 140/630 = 1200 + 140/630 = 1340/630
  5. 1340/630 simplified gives 134/63
  6. So, 40/21 + 20/90 = 134/63
    In mixed form: 28/63

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