Add 28/49 and 21/63
28/49 + 21/63 is 19/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 63 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
28/49 = 28 × 9/49 × 9 = 252/441 - Likewise, for the 2nd fraction, since 63 × 7 = 441,
21/63 = 21 × 7/63 × 7 = 147/441 - Add the two like fractions:
252/441 + 147/441 = 252 + 147/441 = 399/441 - 399/441 simplified gives 19/21
- So, 28/49 + 21/63 = 19/21
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