Subtract 21/25 from 30/70
30/70 - 21/25 is -72/175.
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,
30/70 = 30 × 5/70 × 5 = 150/350 - Likewise, for the 2nd fraction, since 25 × 14 = 350,
21/25 = 21 × 14/25 × 14 = 294/350 - Subtract the two like fractions:
150/350 - 294/350 = 150 - 294/350 = -144/350 - After reducing the fraction, the answer is -72/175
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