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Add 3/56 and 20/90

3/56 + 20/90 is 139/504.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 90 is 2520
  2. For the 1st fraction, since 56 × 45 = 2520,
    3/56 = 3 × 45/56 × 45 = 135/2520
  3. Likewise, for the 2nd fraction, since 90 × 28 = 2520,
    20/90 = 20 × 28/90 × 28 = 560/2520
  4. Add the two fractions:
    135/2520 + 560/2520 = 135 + 560/2520 = 695/2520
  5. After reducing the fraction, the answer is 139/504

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