Add 1/18 and 72/20
1st number: 1/18, 2nd number: 3 12/20
1/18 + 72/20 is 329/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
1/18 = 1 × 10/18 × 10 = 10/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Add the two like fractions:
10/180 + 648/180 = 10 + 648/180 = 658/180 - 658/180 simplified gives 329/90
- So, 1/18 + 72/20 = 329/90
In mixed form: 359/90
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