Add 20/42 and 21/35
20/42 + 21/35 is 113/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Add the two like fractions:
100/210 + 126/210 = 100 + 126/210 = 226/210 - 226/210 simplified gives 113/105
- So, 20/42 + 21/35 = 113/105
In mixed form: 18/105
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