Add 21/15 and 72/36
1st number: 1 6/15, 2nd number: 2 0/36
21/15 + 72/36 is 17/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 15 × 12 = 180,
21/15 = 21 × 12/15 × 12 = 252/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
72/36 = 72 × 5/36 × 5 = 360/180 - Add the two like fractions:
252/180 + 360/180 = 252 + 360/180 = 612/180 - 612/180 simplified gives 17/5
- So, 21/15 + 72/36 = 17/5
In mixed form: 32/5
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