Add 21/3 and 72/63
1st number: 7 0/3, 2nd number: 1 9/63
21/3 + 72/63 is 57/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 3 × 21 = 63,
21/3 = 21 × 21/3 × 21 = 441/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
72/63 = 72 × 1/63 × 1 = 72/63 - Add the two like fractions:
441/63 + 72/63 = 441 + 72/63 = 513/63 - 513/63 simplified gives 57/7
- So, 21/3 + 72/63 = 57/7
In mixed form: 81/7
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