Subtract 56/21 from 1/40, Solve 1/40

Subtract 56/21 from 1/40

1^st number: 1/40, 2^nd number: 2 14/21

1/40 - 56/21 is -317/120.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 40 × 21 = 840,
1/40 = 1 × 21/40 × 21 = 21/840
Likewise, for the 2nd fraction, since 21 × 40 = 840,
56/21 = 56 × 40/21 × 40 = 2240/840
Subtract the two like fractions:
21/840 - 2240/840 = 21 - 2240/840 = -2219/840
After reducing the fraction, the answer is -317/120

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