Add 42/21 and 18/10
1st number: 2 0/21, 2nd number: 1 8/10
42/21 + 18/10 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
42/21 = 42 × 10/21 × 10 = 420/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
18/10 = 18 × 21/10 × 21 = 378/210 - Add the two like fractions:
420/210 + 378/210 = 420 + 378/210 = 798/210 - 798/210 simplified gives 19/5
- So, 42/21 + 18/10 = 19/5
In mixed form: 34/5
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