Subtract 21/45 from 42/10
1st number: 4 2/10, 2nd number: 21/45
42/10 - 21/45 is 56/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
42/10 = 42 × 9/10 × 9 = 378/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Subtract the two like fractions:
378/90 - 42/90 = 378 - 42/90 = 336/90 - After reducing the fraction, the answer is 56/15
- In mixed form: 311/15
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