Add 42/21 and 54/7
1st number: 2 0/21, 2nd number: 7 5/7
42/21 + 54/7 is 68/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
42/21 = 42 × 1/21 × 1 = 42/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
54/7 = 54 × 3/7 × 3 = 162/21 - Add the two like fractions:
42/21 + 162/21 = 42 + 162/21 = 204/21 - 204/21 simplified gives 68/7
- So, 42/21 + 54/7 = 68/7
In mixed form: 95/7
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