Subtract 45/42 from 9/80
1st number: 9/80, 2nd number: 1 3/42
9/80 - 45/42 is -537/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
9/80 = 9 × 21/80 × 21 = 189/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
45/42 = 45 × 40/42 × 40 = 1800/1680 - Subtract the two like fractions:
189/1680 - 1800/1680 = 189 - 1800/1680 = -1611/1680 - After reducing the fraction, the answer is -537/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/80-45/42 9/80-90/42 9/80-45/84 27/80-45/42 45/80-45/42 63/80-45/42