Subtract 7/80 from 8/30
8/30 - 7/80 is 43/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
8/30 = 8 × 8/30 × 8 = 64/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
7/80 = 7 × 3/80 × 3 = 21/240 - Subtract the two like fractions:
64/240 - 21/240 = 64 - 21/240 = 43/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-7/80 8/30-14/80 8/60-7/80 24/30-7/80 8/30-21/80 8/90-7/80 40/30-7/80 8/30-35/80 56/30-7/80 8/30-49/80