Subtract 1/90 from 63/42
1st number: 1 21/42, 2nd number: 1/90
63/42 - 1/90 is 67/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
63/42 = 63 × 15/42 × 15 = 945/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
1/90 = 1 × 7/90 × 7 = 7/630 - Subtract the two like fractions:
945/630 - 7/630 = 945 - 7/630 = 938/630 - After reducing the fraction, the answer is 67/45
- In mixed form: 122/45
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