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Add 1/20 and 27/28

1/20 + 27/28 is 71/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 28 is 140
  2. For the 1st fraction, since 20 × 7 = 140,
    1/20 = 1 × 7/20 × 7 = 7/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    27/28 = 27 × 5/28 × 5 = 135/140
  4. Add the two fractions:
    7/140 + 135/140 = 7 + 135/140 = 142/140
  5. 142/140 simplified gives 71/70
  6. So, 1/20 + 27/28 = 71/70
    In mixed form: 11/70

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