Subtract 3/72 from 90/21
1st number: 4 6/21, 2nd number: 3/72
90/21 - 3/72 is 713/168.
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,
90/21 = 90 × 24/21 × 24 = 2160/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504 - Subtract the two like fractions:
2160/504 - 21/504 = 2160 - 21/504 = 2139/504 - After reducing the fraction, the answer is 713/168
- In mixed form: 441/168
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