Subtract 1/50 from 21/70
21/70 - 1/50 is 7/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 50 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
21/70 = 21 × 5/70 × 5 = 105/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
1/50 = 1 × 7/50 × 7 = 7/350 - Subtract the two like fractions:
105/350 - 7/350 = 105 - 7/350 = 98/350 - After reducing the fraction, the answer is 7/25
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