Subtract 25/18 from 21/30
1st number: 21/30, 2nd number: 1 7/18
21/30 - 25/18 is -31/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
21/30 = 21 × 3/30 × 3 = 63/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
25/18 = 25 × 5/18 × 5 = 125/90 - Subtract the two like fractions:
63/90 - 125/90 = 63 - 125/90 = -62/90 - After reducing the fraction, the answer is -31/45
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