Add 18/42 and 70/90
18/42 + 70/90 is 76/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
18/42 = 18 × 15/42 × 15 = 270/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
70/90 = 70 × 7/90 × 7 = 490/630 - Add the two like fractions:
270/630 + 490/630 = 270 + 490/630 = 760/630 - 760/630 simplified gives 76/63
- So, 18/42 + 70/90 = 76/63
In mixed form: 113/63
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