Subtract 5/90 from 84/21
1st number: 4 0/21, 2nd number: 5/90
84/21 - 5/90 is 71/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
84/21 = 84 × 30/21 × 30 = 2520/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Subtract the two like fractions:
2520/630 - 35/630 = 2520 - 35/630 = 2485/630 - After reducing the fraction, the answer is 71/18
- In mixed form: 317/18
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