Add 15/45 and 12/7
1st number: 15/45, 2nd number: 1 5/7
15/45 + 12/7 is 43/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
12/7 = 12 × 45/7 × 45 = 540/315 - Add the two like fractions:
105/315 + 540/315 = 105 + 540/315 = 645/315 - 645/315 simplified gives 43/21
- So, 15/45 + 12/7 = 43/21
In mixed form: 21/21
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