Subtract 24/21 from 2/40, Solve 2/40

Subtract 24/21 from 2/40

1^st number: 2/40, 2^nd number: 1 3/21

2/40 - 24/21 is -153/140.

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,
2/40 = 2 × 21/40 × 21 = 42/840
Likewise, for the 2nd fraction, since 21 × 40 = 840,
24/21 = 24 × 40/21 × 40 = 960/840
Subtract the two like fractions:
42/840 - 960/840 = 42 - 960/840 = -918/840
After reducing the fraction, the answer is -153/140

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