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Add 90/72 and 21/20

1st number: 1 18/72, 2nd number: 1 1/20

90/72 + 21/20 is 23/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 20 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    90/72 = 90 × 5/72 × 5 = 450/360
  3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
    21/20 = 21 × 18/20 × 18 = 378/360
  4. Add the two like fractions:
    450/360 + 378/360 = 450 + 378/360 = 828/360
  5. 828/360 simplified gives 23/10
  6. So, 90/72 + 21/20 = 23/10
    In mixed form: 23/10

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