Subtract 21/80 from 18/4
1st number: 4 2/4, 2nd number: 21/80
18/4 - 21/80 is 339/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
18/4 = 18 × 20/4 × 20 = 360/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Subtract the two like fractions:
360/80 - 21/80 = 360 - 21/80 = 339/80 - In mixed form: 419/80
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