Add 18/21 and 42/35
1st number: 18/21, 2nd number: 1 7/35
18/21 + 42/35 is 72/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
18/21 = 18 × 5/21 × 5 = 90/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
42/35 = 42 × 3/35 × 3 = 126/105 - Add the two like fractions:
90/105 + 126/105 = 90 + 126/105 = 216/105 - 216/105 simplified gives 72/35
- So, 18/21 + 42/35 = 72/35
In mixed form: 22/35
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