Add 72/20 and 20/90
1st number: 3 12/20, 2nd number: 20/90
72/20 + 20/90 is 172/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Add the two like fractions:
648/180 + 40/180 = 648 + 40/180 = 688/180 - 688/180 simplified gives 172/45
- So, 72/20 + 20/90 = 172/45
In mixed form: 337/45
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