Subtract 7/72 from 90/21
1st number: 4 6/21, 2nd number: 7/72
90/21 - 7/72 is 2111/504.
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,
90/21 = 90 × 24/21 × 24 = 2160/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
7/72 = 7 × 7/72 × 7 = 49/504 - Subtract the two like fractions:
2160/504 - 49/504 = 2160 - 49/504 = 2111/504 - In mixed form: 495/504
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