Add 80/8 and 90/70
1st number: 10 0/8, 2nd number: 1 20/70
80/8 + 90/70 is 79/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
80/8 = 80 × 35/8 × 35 = 2800/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
90/70 = 90 × 4/70 × 4 = 360/280 - Add the two like fractions:
2800/280 + 360/280 = 2800 + 360/280 = 3160/280 - 3160/280 simplified gives 79/7
- So, 80/8 + 90/70 = 79/7
In mixed form: 112/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/16+90/70 80/24+90/70 80/40+90/70 80/56+90/70