Add 90/70 and 36/42
1st number: 1 20/70, 2nd number: 36/42
90/70 + 36/42 is 15/7.
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,
36/42 = 36 × 5/42 × 5 = 180/210 - Add the two like fractions:
270/210 + 180/210 = 270 + 180/210 = 450/210 - 450/210 simplified gives 15/7
- So, 90/70 + 36/42 = 15/7
In mixed form: 21/7
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