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Add 21/25 and 21/28

21/25 + 21/28 is 159/100.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 28 is 700

    Next, find the equivalent fraction of both fractional numbers with denominator 700
  2. For the 1st fraction, since 25 × 28 = 700,
    21/25 = 21 × 28/25 × 28 = 588/700
  3. Likewise, for the 2nd fraction, since 28 × 25 = 700,
    21/28 = 21 × 25/28 × 25 = 525/700
  4. Add the two like fractions:
    588/700 + 525/700 = 588 + 525/700 = 1113/700
  5. 1113/700 simplified gives 159/100
  6. So, 21/25 + 21/28 = 159/100
    In mixed form: 159/100

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