Subtract 20/72 from 98/21
1st number: 4 14/21, 2nd number: 20/72
98/21 - 20/72 is 79/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
98/21 = 98 × 24/21 × 24 = 2352/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Subtract the two like fractions:
2352/504 - 140/504 = 2352 - 140/504 = 2212/504 - After reducing the fraction, the answer is 79/18
- In mixed form: 47/18
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