Add 7/8 and 72/21
1st number: 7/8, 2nd number: 3 9/21
7/8 + 72/21 is 241/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
7/8 = 7 × 21/8 × 21 = 147/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
72/21 = 72 × 8/21 × 8 = 576/168 - Add the two like fractions:
147/168 + 576/168 = 147 + 576/168 = 723/168 - 723/168 simplified gives 241/56
- So, 7/8 + 72/21 = 241/56
In mixed form: 417/56
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