Add 15/18 and 45/70
15/18 + 45/70 is 31/21.
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,
15/18 = 15 × 35/18 × 35 = 525/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
45/70 = 45 × 9/70 × 9 = 405/630 - Add the two like fractions:
525/630 + 405/630 = 525 + 405/630 = 930/630 - 930/630 simplified gives 31/21
- So, 15/18 + 45/70 = 31/21
In mixed form: 110/21
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