Add 21/14 and 72/20
1st number: 1 7/14, 2nd number: 3 12/20
21/14 + 72/20 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
21/14 = 21 × 10/14 × 10 = 210/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
72/20 = 72 × 7/20 × 7 = 504/140 - Add the two like fractions:
210/140 + 504/140 = 210 + 504/140 = 714/140 - 714/140 simplified gives 51/10
- So, 21/14 + 72/20 = 51/10
In mixed form: 51/10
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