Subtract 45/30 from 28/90
1st number: 28/90, 2nd number: 1 15/30
28/90 - 45/30 is -107/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
45/30 = 45 × 3/30 × 3 = 135/90 - Subtract the two like fractions:
28/90 - 135/90 = 28 - 135/90 = -107/90
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