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