Subtract 45/7 from 3/72, Solve 3/72

Subtract 45/7 from 3/72

1^st number: 3/72, 2^nd number: 6 3/7

3/72 - 45/7 is -1073/168.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
45/7 = 45 × 72/7 × 72 = 3240/504
Subtract the two like fractions:
21/504 - 3240/504 = 21 - 3240/504 = -3219/504
After reducing the fraction, the answer is -1073/168

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