Add 15/10 and 80/40
1st number: 1 5/10, 2nd number: 2 0/40
15/10 + 80/40 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
15/10 = 15 × 4/10 × 4 = 60/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
80/40 = 80 × 1/40 × 1 = 80/40 - Add the two like fractions:
60/40 + 80/40 = 60 + 80/40 = 140/40 - 140/40 simplified gives 7/2
- So, 15/10 + 80/40 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/10+80/40 15/20+80/40 45/10+80/40 15/30+80/40 75/10+80/40 15/50+80/40 15/70+80/40