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Add 18/45 and 70/20

1st number: 18/45, 2nd number: 3 10/20

18/45 + 70/20 is 39/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 45 × 4 = 180,
    18/45 = 18 × 4/45 × 4 = 72/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    70/20 = 70 × 9/20 × 9 = 630/180
  4. Add the two like fractions:
    72/180 + 630/180 = 72 + 630/180 = 702/180
  5. 702/180 simplified gives 39/10
  6. So, 18/45 + 70/20 = 39/10
    In mixed form: 39/10

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