Add 90/80 and 45/4
1st number: 1 10/80, 2nd number: 11 1/4
90/80 + 45/4 is 99/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Likewise, for the 2nd fraction, since 4 × 20 = 80,
45/4 = 45 × 20/4 × 20 = 900/80 - Add the two like fractions:
90/80 + 900/80 = 90 + 900/80 = 990/80 - 990/80 simplified gives 99/8
- So, 90/80 + 45/4 = 99/8
In mixed form: 123/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+90/4 90/80+45/8 90/80+45/12 90/80+45/20 90/80+45/28