Subtract 18/80 from 90/60
1st number: 1 30/60, 2nd number: 18/80
90/60 - 18/80 is 51/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 60 × 4 = 240,
90/60 = 90 × 4/60 × 4 = 360/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
18/80 = 18 × 3/80 × 3 = 54/240 - Subtract the two like fractions:
360/240 - 54/240 = 360 - 54/240 = 306/240 - After reducing the fraction, the answer is 51/40
- In mixed form: 111/40
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