Add 72/21 and 42/6
1st number: 3 9/21, 2nd number: 7 0/6
72/21 + 42/6 is 73/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
72/21 = 72 × 2/21 × 2 = 144/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
42/6 = 42 × 7/6 × 7 = 294/42 - Add the two like fractions:
144/42 + 294/42 = 144 + 294/42 = 438/42 - 438/42 simplified gives 73/7
- So, 72/21 + 42/6 = 73/7
In mixed form: 103/7
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