Add 21/30 and 28/49
21/30 + 28/49 is 89/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 49 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 30 × 49 = 1470,
21/30 = 21 × 49/30 × 49 = 1029/1470 - Likewise, for the 2nd fraction, since 49 × 30 = 1470,
28/49 = 28 × 30/49 × 30 = 840/1470 - Add the two like fractions:
1029/1470 + 840/1470 = 1029 + 840/1470 = 1869/1470 - 1869/1470 simplified gives 89/70
- So, 21/30 + 28/49 = 89/70
In mixed form: 119/70
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