Subtract 18/90 from 24/21
1st number: 1 3/21, 2nd number: 18/90
24/21 - 18/90 is 33/35.
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,
24/21 = 24 × 30/21 × 30 = 720/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Subtract the two like fractions:
720/630 - 126/630 = 720 - 126/630 = 594/630 - After reducing the fraction, the answer is 33/35
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