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Add 21/70 and 9/15

21/70 + 9/15 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 15 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    21/70 = 21 × 3/70 × 3 = 63/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    9/15 = 9 × 14/15 × 14 = 126/210
  4. Add the two like fractions:
    63/210 + 126/210 = 63 + 126/210 = 189/210
  5. 189/210 simplified gives 9/10
  6. So, 21/70 + 9/15 = 9/10

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