Add 81/18 and 20/70
1st number: 4 9/18, 2nd number: 20/70
81/18 + 20/70 is 67/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
81/18 = 81 × 35/18 × 35 = 2835/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Add the two like fractions:
2835/630 + 180/630 = 2835 + 180/630 = 3015/630 - 3015/630 simplified gives 67/14
- So, 81/18 + 20/70 = 67/14
In mixed form: 411/14
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