Add 70/30 and 90/7
1st number: 2 10/30, 2nd number: 12 6/7
70/30 + 90/7 is 319/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
70/30 = 70 × 7/30 × 7 = 490/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
90/7 = 90 × 30/7 × 30 = 2700/210 - Add the two like fractions:
490/210 + 2700/210 = 490 + 2700/210 = 3190/210 - 3190/210 simplified gives 319/21
- So, 70/30 + 90/7 = 319/21
In mixed form: 154/21
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