Subtract 3/45 from 72/42
1st number: 1 30/42, 2nd number: 3/45
72/42 - 3/45 is 173/105.
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,
72/42 = 72 × 15/42 × 15 = 1080/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
3/45 = 3 × 14/45 × 14 = 42/630 - Subtract the two like fractions:
1080/630 - 42/630 = 1080 - 42/630 = 1038/630 - After reducing the fraction, the answer is 173/105
- In mixed form: 168/105
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