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Add 90/84 and 42/72

1st number: 1 6/84, 2nd number: 42/72

90/84 + 42/72 is 139/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 84 × 6 = 504,
    90/84 = 90 × 6/84 × 6 = 540/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    42/72 = 42 × 7/72 × 7 = 294/504
  4. Add the two like fractions:
    540/504 + 294/504 = 540 + 294/504 = 834/504
  5. 834/504 simplified gives 139/84
  6. So, 90/84 + 42/72 = 139/84
    In mixed form: 155/84

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