Add 21/35 and 7/18
21/35 + 7/18 is 89/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
21/35 = 21 × 18/35 × 18 = 378/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
7/18 = 7 × 35/18 × 35 = 245/630 - Add the two like fractions:
378/630 + 245/630 = 378 + 245/630 = 623/630 - 623/630 simplified gives 89/90
- So, 21/35 + 7/18 = 89/90
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