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Add 28/60 and 20/70

28/60 + 20/70 is 79/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 70 is 420
  2. For the 1st fraction, since 60 × 7 = 420,
    28/60 = 28 × 7/60 × 7 = 196/420
  3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
    20/70 = 20 × 6/70 × 6 = 120/420
  4. Add the two fractions:
    196/420 + 120/420 = 196 + 120/420 = 316/420
  5. 316/420 simplified gives 79/105
  6. So, 28/60 + 20/70 = 79/105

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