Subtract 30/42 from 72/45
1st number: 1 27/45, 2nd number: 30/42
72/45 - 30/42 is 31/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
72/45 = 72 × 14/45 × 14 = 1008/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
30/42 = 30 × 15/42 × 15 = 450/630 - Subtract the two like fractions:
1008/630 - 450/630 = 1008 - 450/630 = 558/630 - After reducing the fraction, the answer is 31/35
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