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Add 21/36 and 30/70

21/36 + 30/70 is 85/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 70 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 36 × 35 = 1260,
    21/36 = 21 × 35/36 × 35 = 735/1260
  3. Likewise, for the 2nd fraction, since 70 × 18 = 1260,
    30/70 = 30 × 18/70 × 18 = 540/1260
  4. Add the two like fractions:
    735/1260 + 540/1260 = 735 + 540/1260 = 1275/1260
  5. 1275/1260 simplified gives 85/84
  6. So, 21/36 + 30/70 = 85/84
    In mixed form: 11/84

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