Add 15/2 and 90/80
1st number: 7 1/2, 2nd number: 1 10/80
15/2 + 90/80 is 69/8.
Steps for adding 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,
15/2 = 15 × 40/2 × 40 = 600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Add the two like fractions:
600/80 + 90/80 = 600 + 90/80 = 690/80 - 690/80 simplified gives 69/8
- So, 15/2 + 90/80 = 69/8
In mixed form: 85/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2+90/80 15/4+90/80 45/2+90/80 15/6+90/80 75/2+90/80 15/10+90/80 15/14+90/80