Subtract 30/10 from 70/80
1st number: 70/80, 2nd number: 3 0/10
70/80 - 30/10 is -17/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
70/80 = 70 × 1/80 × 1 = 70/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
30/10 = 30 × 8/10 × 8 = 240/80 - Subtract the two like fractions:
70/80 - 240/80 = 70 - 240/80 = -170/80 - After reducing the fraction, the answer is -17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80-60/10 70/80-30/20 70/80-90/10 70/80-30/50 70/80-30/70