Add 21/49 and 45/70
21/49 + 45/70 is 15/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
21/49 = 21 × 10/49 × 10 = 210/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
45/70 = 45 × 7/70 × 7 = 315/490 - Add the two like fractions:
210/490 + 315/490 = 210 + 315/490 = 525/490 - 525/490 simplified gives 15/14
- So, 21/49 + 45/70 = 15/14
In mixed form: 11/14
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