Subtract 21/49 from 9/30
9/30 - 21/49 is -9/70.
Steps for subtracting 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,
9/30 = 9 × 49/30 × 49 = 441/1470 - Likewise, for the 2nd fraction, since 49 × 30 = 1470,
21/49 = 21 × 30/49 × 30 = 630/1470 - Subtract the two like fractions:
441/1470 - 630/1470 = 441 - 630/1470 = -189/1470 - After reducing the fraction, the answer is -9/70
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