Add 30/21 and 40/10
1st number: 1 9/21, 2nd number: 4 0/10
30/21 + 40/10 is 38/7.
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,
30/21 = 30 × 10/21 × 10 = 300/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
40/10 = 40 × 21/10 × 21 = 840/210 - Add the two like fractions:
300/210 + 840/210 = 300 + 840/210 = 1140/210 - 1140/210 simplified gives 38/7
- So, 30/21 + 40/10 = 38/7
In mixed form: 53/7
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