Add 45/70 and 20/15
1st number: 45/70, 2nd number: 1 5/15
45/70 + 20/15 is 83/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
45/70 = 45 × 3/70 × 3 = 135/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
20/15 = 20 × 14/15 × 14 = 280/210 - Add the two like fractions:
135/210 + 280/210 = 135 + 280/210 = 415/210 - 415/210 simplified gives 83/42
- So, 45/70 + 20/15 = 83/42
In mixed form: 141/42
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