Subtract 21/10 from 30/49
1st number: 30/49, 2nd number: 2 1/10
30/49 - 21/10 is -729/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 10 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
30/49 = 30 × 10/49 × 10 = 300/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
21/10 = 21 × 49/10 × 49 = 1029/490 - Subtract the two like fractions:
300/490 - 1029/490 = 300 - 1029/490 = -729/490
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