Add 28/70 and 1/21
28/70 + 1/21 is 47/105.
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,
28/70 = 28 × 3/70 × 3 = 84/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
1/21 = 1 × 10/21 × 10 = 10/210 - Add the two like fractions:
84/210 + 10/210 = 84 + 10/210 = 94/210 - 94/210 simplified gives 47/105
- So, 28/70 + 1/21 = 47/105
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