Add 7/10 and 20/42
7/10 + 20/42 is 247/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Add the two like fractions:
147/210 + 100/210 = 147 + 100/210 = 247/210 - So, 7/10 + 20/42 = 247/210
In mixed form: 137/210
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