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Add 42/7 and 90/20

1st number: 6 0/7, 2nd number: 4 10/20

42/7 + 90/20 is 21/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    42/7 = 42 × 20/7 × 20 = 840/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    90/20 = 90 × 7/20 × 7 = 630/140
  4. Add the two like fractions:
    840/140 + 630/140 = 840 + 630/140 = 1470/140
  5. 1470/140 simplified gives 21/2
  6. So, 42/7 + 90/20 = 21/2
    In mixed form: 101/2

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