Add 20/45 and 80/63
1st number: 20/45, 2nd number: 1 17/63
20/45 + 80/63 is 12/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
80/63 = 80 × 5/63 × 5 = 400/315 - Add the two like fractions:
140/315 + 400/315 = 140 + 400/315 = 540/315 - 540/315 simplified gives 12/7
- So, 20/45 + 80/63 = 12/7
In mixed form: 15/7
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