Subtract 45/6 from 30/80
1st number: 30/80, 2nd number: 7 3/6
30/80 - 45/6 is -57/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 6 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240 - Likewise, for the 2nd fraction, since 6 × 40 = 240,
45/6 = 45 × 40/6 × 40 = 1800/240 - Subtract the two like fractions:
90/240 - 1800/240 = 90 - 1800/240 = -1710/240 - After reducing the fraction, the answer is -57/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80-45/6 30/80-90/6 30/80-45/12 90/80-45/6 30/80-45/18 30/80-45/30 30/80-45/42