Subtract 28/15 from 30/90
1st number: 30/90, 2nd number: 1 13/15
30/90 - 28/15 is -23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
30/90 = 30 × 1/90 × 1 = 30/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
28/15 = 28 × 6/15 × 6 = 168/90 - Subtract the two like fractions:
30/90 - 168/90 = 30 - 168/90 = -138/90 - After reducing the fraction, the answer is -23/15
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