Add 72/12 and 21/40
1st number: 6 0/12, 2nd number: 21/40
72/12 + 21/40 is 261/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
72/12 = 72 × 10/12 × 10 = 720/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Add the two like fractions:
720/120 + 63/120 = 720 + 63/120 = 783/120 - 783/120 simplified gives 261/40
- So, 72/12 + 21/40 = 261/40
In mixed form: 621/40
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