Subtract 5/6 from 20/40, Solve 20/40

Subtract 5/6 from 20/40

20/40 - 5/6 is -1/3.

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,
20/40 = 20 × 3/40 × 3 = 60/120
Likewise, for the 2nd fraction, since 6 × 20 = 120,
5/6 = 5 × 20/6 × 20 = 100/120
Subtract the two like fractions:
60/120 - 100/120 = 60 - 100/120 = -40/120
After reducing the fraction, the answer is -1/3

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