Add 7/10 and 30/80
7/10 + 30/80 is 43/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
7/10 = 7 × 8/10 × 8 = 56/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80 - Add the two like fractions:
56/80 + 30/80 = 56 + 30/80 = 86/80 - 86/80 simplified gives 43/40
- So, 7/10 + 30/80 = 43/40
In mixed form: 13/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10+30/80 7/10+60/80 7/20+30/80 21/10+30/80 7/10+90/80 7/30+30/80 35/10+30/80 7/50+30/80 49/10+30/80 7/70+30/80