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Add 90/70 and 9/80

1st number: 1 20/70, 2nd number: 9/80

90/70 + 9/80 is 783/560.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560
  2. For the 1st fraction, since 70 × 8 = 560,
    90/70 = 90 × 8/70 × 8 = 720/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    9/80 = 9 × 7/80 × 7 = 63/560
  4. Add the two fractions:
    720/560 + 63/560 = 720 + 63/560 = 783/560
  5. So, 90/70 + 9/80 = 783/560
    In mixed form: 1223/560

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