Subtract 21/10 from 70/9
1st number: 7 7/9, 2nd number: 2 1/10
70/9 - 21/10 is 511/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
70/9 = 70 × 10/9 × 10 = 700/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Subtract the two like fractions:
700/90 - 189/90 = 700 - 189/90 = 511/90 - In mixed form: 561/90
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