Add 42/45 and 18/70
42/45 + 18/70 is 25/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Add the two like fractions:
588/630 + 162/630 = 588 + 162/630 = 750/630 - 750/630 simplified gives 25/21
- So, 42/45 + 18/70 = 25/21
In mixed form: 14/21
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