Subtract 21/90 from 42/25
1st number: 1 17/25, 2nd number: 21/90
42/25 - 21/90 is 217/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
42/25 = 42 × 18/25 × 18 = 756/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Subtract the two like fractions:
756/450 - 105/450 = 756 - 105/450 = 651/450 - After reducing the fraction, the answer is 217/150
- In mixed form: 167/150
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