Subtract 20/8 from 4/54, Solve 4/54

Subtract 20/8 from 4/54

1^st number: 4/54, 2^nd number: 2 4/8

4/54 - 20/8 is -131/54.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 8 is 216

Next, find the equivalent fraction of both fractional numbers with denominator 216
For the 1st fraction, since 54 × 4 = 216,
4/54 = 4 × 4/54 × 4 = 16/216
Likewise, for the 2nd fraction, since 8 × 27 = 216,
20/8 = 20 × 27/8 × 27 = 540/216
Subtract the two like fractions:
16/216 - 540/216 = 16 - 540/216 = -524/216
After reducing the fraction, the answer is -131/54

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