Subtract 15/98 from 21/70
21/70 - 15/98 is 36/245.
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,
15/98 = 15 × 5/98 × 5 = 75/490 - Subtract the two like fractions:
147/490 - 75/490 = 147 - 75/490 = 72/490 - After reducing the fraction, the answer is 36/245
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