Solutions by everydaycalculation.com

## Subtract 3/8 from 4/42

4/42 - 3/8 is -47/168.

#### Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
2. For the 1st fraction, since 42 × 4 = 168,
4/42 = 4 × 4/42 × 4 = 16/168
3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
3/8 = 3 × 21/8 × 21 = 63/168
4. Subtract the two fractions:
16/168 - 63/168 = 16 - 63/168 = -47/168

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