Subtract 28/8 from 18/90
1st number: 18/90, 2nd number: 3 4/8
18/90 - 28/8 is -33/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
18/90 = 18 × 4/90 × 4 = 72/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
28/8 = 28 × 45/8 × 45 = 1260/360 - Subtract the two like fractions:
72/360 - 1260/360 = 72 - 1260/360 = -1188/360 - After reducing the fraction, the answer is -33/10
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