Subtract 45/70 from 12/24
12/24 - 45/70 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 70 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 24 × 35 = 840,
12/24 = 12 × 35/24 × 35 = 420/840 - Likewise, for the 2nd fraction, since 70 × 12 = 840,
45/70 = 45 × 12/70 × 12 = 540/840 - Subtract the two like fractions:
420/840 - 540/840 = 420 - 540/840 = -120/840 - After reducing the fraction, the answer is -1/7
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