Subtract 75/21 from 49/72
1st number: 49/72, 2nd number: 3 12/21
49/72 - 75/21 is -1457/504.
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,
49/72 = 49 × 7/72 × 7 = 343/504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
75/21 = 75 × 24/21 × 24 = 1800/504 - Subtract the two like fractions:
343/504 - 1800/504 = 343 - 1800/504 = -1457/504
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