Subtract 42/40 from 40/70
1st number: 40/70, 2nd number: 1 2/40
40/70 - 42/40 is -67/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
40/70 = 40 × 4/70 × 4 = 160/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Subtract the two like fractions:
160/280 - 294/280 = 160 - 294/280 = -134/280 - After reducing the fraction, the answer is -67/140
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