Subtract 70/21 from 18/10
1st number: 1 8/10, 2nd number: 3 7/21
18/10 - 70/21 is -23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
18/10 = 18 × 21/10 × 21 = 378/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Subtract the two like fractions:
378/210 - 700/210 = 378 - 700/210 = -322/210 - After reducing the fraction, the answer is -23/15
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