Subtract 40/90 from 75/21
1st number: 3 12/21, 2nd number: 40/90
75/21 - 40/90 is 197/63.
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,
75/21 = 75 × 30/21 × 30 = 2250/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
40/90 = 40 × 7/90 × 7 = 280/630 - Subtract the two like fractions:
2250/630 - 280/630 = 2250 - 280/630 = 1970/630 - After reducing the fraction, the answer is 197/63
- In mixed form: 38/63
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