Subtract 28/90 from 21/14
1st number: 1 7/14, 2nd number: 28/90
21/14 - 28/90 is 107/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 14 × 45 = 630,
21/14 = 21 × 45/14 × 45 = 945/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
28/90 = 28 × 7/90 × 7 = 196/630 - Subtract the two like fractions:
945/630 - 196/630 = 945 - 196/630 = 749/630 - After reducing the fraction, the answer is 107/90
- In mixed form: 117/90
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