Add 90/70 and 7/42
1st number: 1 20/70, 2nd number: 7/42
90/70 + 7/42 is 61/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Add the two like fractions:
270/210 + 35/210 = 270 + 35/210 = 305/210 - 305/210 simplified gives 61/42
- So, 90/70 + 7/42 = 61/42
In mixed form: 119/42
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