Subtract 21/45 from 48/42
1st number: 1 6/42, 2nd number: 21/45
48/42 - 21/45 is 71/105.
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,
48/42 = 48 × 15/42 × 15 = 720/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
21/45 = 21 × 14/45 × 14 = 294/630 - Subtract the two like fractions:
720/630 - 294/630 = 720 - 294/630 = 426/630 - After reducing the fraction, the answer is 71/105
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