Subtract 5/72 from 30/21
1st number: 1 9/21, 2nd number: 5/72
30/21 - 5/72 is 685/504.
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,
30/21 = 30 × 24/21 × 24 = 720/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
5/72 = 5 × 7/72 × 7 = 35/504 - Subtract the two like fractions:
720/504 - 35/504 = 720 - 35/504 = 685/504 - In mixed form: 1181/504
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