Subtract 21/25 from 18/70
18/70 - 21/25 is -102/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 25 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
18/70 = 18 × 5/70 × 5 = 90/350 - Likewise, for the 2nd fraction, since 25 × 14 = 350,
21/25 = 21 × 14/25 × 14 = 294/350 - Subtract the two like fractions:
90/350 - 294/350 = 90 - 294/350 = -204/350 - After reducing the fraction, the answer is -102/175
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