Subtract 9/21 from 2/70
2/70 - 9/21 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
2/70 = 2 × 3/70 × 3 = 6/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
9/21 = 9 × 10/21 × 10 = 90/210 - Subtract the two like fractions:
6/210 - 90/210 = 6 - 90/210 = -84/210 - After reducing the fraction, the answer is -2/5
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