Subtract 20/21 from 90/10
1st number: 9 0/10, 2nd number: 20/21
90/10 - 20/21 is 169/21.
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,
90/10 = 90 × 21/10 × 21 = 1890/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
20/21 = 20 × 10/21 × 10 = 200/210 - Subtract the two like fractions:
1890/210 - 200/210 = 1890 - 200/210 = 1690/210 - After reducing the fraction, the answer is 169/21
- In mixed form: 81/21
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