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Add 90/8 and 21/28

1st number: 11 2/8, 2nd number: 21/28

90/8 + 21/28 is 12/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 28 is 56

    Next, find the equivalent fraction of both fractional numbers with denominator 56
  2. For the 1st fraction, since 8 × 7 = 56,
    90/8 = 90 × 7/8 × 7 = 630/56
  3. Likewise, for the 2nd fraction, since 28 × 2 = 56,
    21/28 = 21 × 2/28 × 2 = 42/56
  4. Add the two like fractions:
    630/56 + 42/56 = 630 + 42/56 = 672/56
  5. 672/56 simplified gives 12/1
  6. So, 90/8 + 21/28 = 12/1

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