Add 15/21 and 54/70
15/21 + 54/70 is 52/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
54/70 = 54 × 3/70 × 3 = 162/210 - Add the two like fractions:
150/210 + 162/210 = 150 + 162/210 = 312/210 - 312/210 simplified gives 52/35
- So, 15/21 + 54/70 = 52/35
In mixed form: 117/35
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