Subtract 42/5 from 12/40
1st number: 12/40, 2nd number: 8 2/5
12/40 - 42/5 is -81/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
12/40 = 12 × 1/40 × 1 = 12/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
42/5 = 42 × 8/5 × 8 = 336/40 - Subtract the two like fractions:
12/40 - 336/40 = 12 - 336/40 = -324/40 - After reducing the fraction, the answer is -81/10
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