Add 30/21 and 40/70
1st number: 1 9/21, 2nd number: 40/70
30/21 + 40/70 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 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 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Add the two like fractions:
300/210 + 120/210 = 300 + 120/210 = 420/210 - 420/210 simplified gives 2/1
- So, 30/21 + 40/70 = 2/1
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