Subtract 21/80 from 28/18
1st number: 1 10/18, 2nd number: 21/80
28/18 - 21/80 is 931/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
28/18 = 28 × 40/18 × 40 = 1120/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Subtract the two like fractions:
1120/720 - 189/720 = 1120 - 189/720 = 931/720 - In mixed form: 1211/720
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