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Add 5/70 and 21/42

5/70 + 21/42 is 4/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    5/70 = 5 × 3/70 × 3 = 15/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    21/42 = 21 × 5/42 × 5 = 105/210
  4. Add the two like fractions:
    15/210 + 105/210 = 15 + 105/210 = 120/210
  5. 120/210 simplified gives 4/7
  6. So, 5/70 + 21/42 = 4/7

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