Add 3/21 and 40/70
3/21 + 40/70 is 5/7.
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,
3/21 = 3 × 10/21 × 10 = 30/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Add the two like fractions:
30/210 + 120/210 = 30 + 120/210 = 150/210 - 150/210 simplified gives 5/7
- So, 3/21 + 40/70 = 5/7
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