Add 42/70 and 45/18
1st number: 42/70, 2nd number: 2 9/18
42/70 + 45/18 is 31/10.
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,
42/70 = 42 × 9/70 × 9 = 378/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
45/18 = 45 × 35/18 × 35 = 1575/630 - Add the two like fractions:
378/630 + 1575/630 = 378 + 1575/630 = 1953/630 - 1953/630 simplified gives 31/10
- So, 42/70 + 45/18 = 31/10
In mixed form: 31/10
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