Subtract 20/7 from 5/45, Solve 5/45

Subtract 20/7 from 5/45

1^st number: 5/45, 2^nd number: 2 6/7

5/45 - 20/7 is -173/63.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
5/45 = 5 × 7/45 × 7 = 35/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
20/7 = 20 × 45/7 × 45 = 900/315
Subtract the two like fractions:
35/315 - 900/315 = 35 - 900/315 = -865/315
After reducing the fraction, the answer is -173/63

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