Subtract 9/8 from 20/75, Solve 20/75

Subtract 9/8 from 20/75

1^st number: 20/75, 2^nd number: 1 1/8

20/75 - 9/8 is -103/120.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 8 is 600

Next, find the equivalent fraction of both fractional numbers with denominator 600
For the 1st fraction, since 75 × 8 = 600,
20/75 = 20 × 8/75 × 8 = 160/600
Likewise, for the 2nd fraction, since 8 × 75 = 600,
9/8 = 9 × 75/8 × 75 = 675/600
Subtract the two like fractions:
160/600 - 675/600 = 160 - 675/600 = -515/600
After reducing the fraction, the answer is -103/120

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