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Add 90/20 and 70/28

1st number: 4 10/20, 2nd number: 2 14/28

90/20 + 70/28 is 7/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 28 is 140
  2. For the 1st fraction, since 20 × 7 = 140,
    90/20 = 90 × 7/20 × 7 = 630/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    70/28 = 70 × 5/28 × 5 = 350/140
  4. Add the two fractions:
    630/140 + 350/140 = 630 + 350/140 = 980/140
  5. After reducing the fraction, the answer is 7/1

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