Add 70/15 and 45/20
1st number: 4 10/15, 2nd number: 2 5/20
70/15 + 45/20 is 83/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
70/15 = 70 × 4/15 × 4 = 280/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Add the two like fractions:
280/60 + 135/60 = 280 + 135/60 = 415/60 - 415/60 simplified gives 83/12
- So, 70/15 + 45/20 = 83/12
In mixed form: 611/12
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