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Add 25/70 and 30/40

25/70 + 30/40 is 31/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    25/70 = 25 × 4/70 × 4 = 100/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    30/40 = 30 × 7/40 × 7 = 210/280
  4. Add the two like fractions:
    100/280 + 210/280 = 100 + 210/280 = 310/280
  5. 310/280 simplified gives 31/28
  6. So, 25/70 + 30/40 = 31/28
    In mixed form: 13/28

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