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Add 28/90 and 70/42

1st number: 28/90, 2nd number: 1 28/42

28/90 + 70/42 is 89/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 42 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    28/90 = 28 × 7/90 × 7 = 196/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    70/42 = 70 × 15/42 × 15 = 1050/630
  4. Add the two like fractions:
    196/630 + 1050/630 = 196 + 1050/630 = 1246/630
  5. 1246/630 simplified gives 89/45
  6. So, 28/90 + 70/42 = 89/45
    In mixed form: 144/45

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