Subtract 20/24 from 30/70
30/70 - 20/24 is -17/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 24 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 70 × 12 = 840,
30/70 = 30 × 12/70 × 12 = 360/840 - Likewise, for the 2nd fraction, since 24 × 35 = 840,
20/24 = 20 × 35/24 × 35 = 700/840 - Subtract the two like fractions:
360/840 - 700/840 = 360 - 700/840 = -340/840 - After reducing the fraction, the answer is -17/42
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