Subtract 20/7 from 15/75, Solve 15/75

Subtract 20/7 from 15/75

1^st number: 15/75, 2^nd number: 2 6/7

15/75 - 20/7 is -93/35.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 7 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 75 × 7 = 525,
15/75 = 15 × 7/75 × 7 = 105/525
Likewise, for the 2nd fraction, since 7 × 75 = 525,
20/7 = 20 × 75/7 × 75 = 1500/525
Subtract the two like fractions:
105/525 - 1500/525 = 105 - 1500/525 = -1395/525
After reducing the fraction, the answer is -93/35

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