Subtract 30/80 from 28/30
28/30 - 30/80 is 67/120.
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,
28/30 = 28 × 8/30 × 8 = 224/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240 - Subtract the two like fractions:
224/240 - 90/240 = 224 - 90/240 = 134/240 - After reducing the fraction, the answer is 67/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-30/80 28/30-60/80 28/60-30/80 84/30-30/80 28/30-90/80 28/90-30/80