Add 12/70 and 28/21
1st number: 12/70, 2nd number: 1 7/21
12/70 + 28/21 is 158/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
28/21 = 28 × 10/21 × 10 = 280/210 - Add the two like fractions:
36/210 + 280/210 = 36 + 280/210 = 316/210 - 316/210 simplified gives 158/105
- So, 12/70 + 28/21 = 158/105
In mixed form: 153/105
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