Add 45/63 and 30/21
1st number: 45/63, 2nd number: 1 9/21
45/63 + 30/21 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
45/63 = 45 × 1/63 × 1 = 45/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
30/21 = 30 × 3/21 × 3 = 90/63 - Add the two like fractions:
45/63 + 90/63 = 45 + 90/63 = 135/63 - 135/63 simplified gives 15/7
- So, 45/63 + 30/21 = 15/7
In mixed form: 21/7
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