Subtract 20/45 from 90/42
1st number: 2 6/42, 2nd number: 20/45
90/42 - 20/45 is 107/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
90/42 = 90 × 15/42 × 15 = 1350/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
20/45 = 20 × 14/45 × 14 = 280/630 - Subtract the two like fractions:
1350/630 - 280/630 = 1350 - 280/630 = 1070/630 - After reducing the fraction, the answer is 107/63
- In mixed form: 144/63
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