Subtract 15/90 from 21/14
1st number: 1 7/14, 2nd number: 15/90
21/14 - 15/90 is 4/3.
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,
15/90 = 15 × 7/90 × 7 = 105/630 - Subtract the two like fractions:
945/630 - 105/630 = 945 - 105/630 = 840/630 - After reducing the fraction, the answer is 4/3
- In mixed form: 11/3
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