Subtract 30/21 from 6/90
1st number: 6/90, 2nd number: 1 9/21
6/90 - 30/21 is -143/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
6/90 = 6 × 7/90 × 7 = 42/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
30/21 = 30 × 30/21 × 30 = 900/630 - Subtract the two like fractions:
42/630 - 900/630 = 42 - 900/630 = -858/630 - After reducing the fraction, the answer is -143/105
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