Subtract 90/21 from 3/72
1st number: 3/72, 2nd number: 4 6/21
3/72 - 90/21 is -713/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
90/21 = 90 × 24/21 × 24 = 2160/504 - Subtract the two like fractions:
21/504 - 2160/504 = 21 - 2160/504 = -2139/504 - After reducing the fraction, the answer is -713/168
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