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Add 90/20 and 15/28

1st number: 4 10/20, 2nd number: 15/28

90/20 + 15/28 is 141/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 28 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    90/20 = 90 × 7/20 × 7 = 630/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    15/28 = 15 × 5/28 × 5 = 75/140
  4. Add the two like fractions:
    630/140 + 75/140 = 630 + 75/140 = 705/140
  5. 705/140 simplified gives 141/28
  6. So, 90/20 + 15/28 = 141/28
    In mixed form: 51/28

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