Add 70/30 and 80/42
1st number: 2 10/30, 2nd number: 1 38/42
70/30 + 80/42 is 89/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 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 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Add the two like fractions:
490/210 + 400/210 = 490 + 400/210 = 890/210 - 890/210 simplified gives 89/21
- So, 70/30 + 80/42 = 89/21
In mixed form: 45/21
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