Subtract 18/72 from 28/7
1st number: 4 0/7, 2nd number: 18/72
28/7 - 18/72 is 15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 7 × 72 = 504,
28/7 = 28 × 72/7 × 72 = 2016/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Subtract the two like fractions:
2016/504 - 126/504 = 2016 - 126/504 = 1890/504 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
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