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Add 4/21 and 56/90

4/21 + 56/90 is 256/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 21 × 30 = 630,
    4/21 = 4 × 30/21 × 30 = 120/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    56/90 = 56 × 7/90 × 7 = 392/630
  4. Add the two like fractions:
    120/630 + 392/630 = 120 + 392/630 = 512/630
  5. 512/630 simplified gives 256/315
  6. So, 4/21 + 56/90 = 256/315

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