Add 72/20 and 9/18
1st number: 3 12/20, 2nd number: 9/18
72/20 + 9/18 is 41/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 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 18 × 10 = 180,
9/18 = 9 × 10/18 × 10 = 90/180 - Add the two like fractions:
648/180 + 90/180 = 648 + 90/180 = 738/180 - 738/180 simplified gives 41/10
- So, 72/20 + 9/18 = 41/10
In mixed form: 41/10
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