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Add 15/30 and 28/70

15/30 + 28/70 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 70 is 210
  2. For the 1st fraction, since 30 × 7 = 210,
    15/30 = 15 × 7/30 × 7 = 105/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    28/70 = 28 × 3/70 × 3 = 84/210
  4. Add the two fractions:
    105/210 + 84/210 = 105 + 84/210 = 189/210
  5. 189/210 simplified gives 9/10
  6. So, 15/30 + 28/70 = 9/10

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