Subtract 12/40 from 2/42, Solve 2/42

Subtract 12/40 from 2/42

2/42 - 12/40 is -53/210.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 42 × 20 = 840,
2/42 = 2 × 20/42 × 20 = 40/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
12/40 = 12 × 21/40 × 21 = 252/840
Subtract the two like fractions:
40/840 - 252/840 = 40 - 252/840 = -212/840
After reducing the fraction, the answer is -53/210

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