Add 72/28 and 20/12
1st number: 2 16/28, 2nd number: 1 8/12
72/28 + 20/12 is 89/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
20/12 = 20 × 7/12 × 7 = 140/84 - Add the two like fractions:
216/84 + 140/84 = 216 + 140/84 = 356/84 - 356/84 simplified gives 89/21
- So, 72/28 + 20/12 = 89/21
In mixed form: 45/21
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