Add 20/15 and 45/63
1st number: 1 5/15, 2nd number: 45/63
20/15 + 45/63 is 43/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
20/15 = 20 × 21/15 × 21 = 420/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
45/63 = 45 × 5/63 × 5 = 225/315 - Add the two like fractions:
420/315 + 225/315 = 420 + 225/315 = 645/315 - 645/315 simplified gives 43/21
- So, 20/15 + 45/63 = 43/21
In mixed form: 21/21
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