Subtract 81/6 from 1/40, Solve 1/40

Subtract 81/6 from 1/40

1^st number: 1/40, 2^nd number: 13 3/6

1/40 - 81/6 is -539/40.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 6 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
1/40 = 1 × 3/40 × 3 = 3/120
Likewise, for the 2nd fraction, since 6 × 20 = 120,
81/6 = 81 × 20/6 × 20 = 1620/120
Subtract the two like fractions:
3/120 - 1620/120 = 3 - 1620/120 = -1617/120
After reducing the fraction, the answer is -539/40

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