Subtract 21/80 from 70/2
1st number: 35 0/2, 2nd number: 21/80
70/2 - 21/80 is 2779/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
70/2 = 70 × 40/2 × 40 = 2800/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Subtract the two like fractions:
2800/80 - 21/80 = 2800 - 21/80 = 2779/80 - In mixed form: 3459/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/2-42/80 70/4-21/80 70/2-63/80 70/6-21/80 70/10-21/80 70/14-21/80