Add 20/70 and 42/18
1st number: 20/70, 2nd number: 2 6/18
20/70 + 42/18 is 55/21.
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,
42/18 = 42 × 35/18 × 35 = 1470/630 - Add the two like fractions:
180/630 + 1470/630 = 180 + 1470/630 = 1650/630 - 1650/630 simplified gives 55/21
- So, 20/70 + 42/18 = 55/21
In mixed form: 213/21
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