Add 3/30 and 42/21
1st number: 3/30, 2nd number: 2 0/21
3/30 + 42/21 is 21/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
42/21 = 42 × 10/21 × 10 = 420/210 - Add the two like fractions:
21/210 + 420/210 = 21 + 420/210 = 441/210 - 441/210 simplified gives 21/10
- So, 3/30 + 42/21 = 21/10
In mixed form: 21/10
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