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Add 1/20 and 21/70

1/20 + 21/70 is 7/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 70 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 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 70 × 2 = 140,
    21/70 = 21 × 2/70 × 2 = 42/140
  4. Add the two like fractions:
    7/140 + 42/140 = 7 + 42/140 = 49/140
  5. 49/140 simplified gives 7/20
  6. So, 1/20 + 21/70 = 7/20

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