Subtract 21/98 from 21/70
21/70 - 21/98 is 3/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 98 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
21/70 = 21 × 7/70 × 7 = 147/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
21/98 = 21 × 5/98 × 5 = 105/490 - Subtract the two like fractions:
147/490 - 105/490 = 147 - 105/490 = 42/490 - After reducing the fraction, the answer is 3/35
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