Subtract 30/56 from 18/80
18/80 - 30/56 is -87/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 56 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
18/80 = 18 × 7/80 × 7 = 126/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
30/56 = 30 × 10/56 × 10 = 300/560 - Subtract the two like fractions:
126/560 - 300/560 = 126 - 300/560 = -174/560 - After reducing the fraction, the answer is -87/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80-30/56 18/80-60/56 54/80-30/56 18/80-90/56 90/80-30/56