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Add 20/70 and 90/42

1st number: 20/70, 2nd number: 2 6/42

20/70 + 90/42 is 17/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    20/70 = 20 × 3/70 × 3 = 60/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    90/42 = 90 × 5/42 × 5 = 450/210
  4. Add the two like fractions:
    60/210 + 450/210 = 60 + 450/210 = 510/210
  5. 510/210 simplified gives 17/7
  6. So, 20/70 + 90/42 = 17/7
    In mixed form: 23/7

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