Add 90/80 and 7/20
1st number: 1 10/80, 2nd number: 7/20
90/80 + 7/20 is 59/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 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 20 × 4 = 80,
7/20 = 7 × 4/20 × 4 = 28/80 - Add the two like fractions:
90/80 + 28/80 = 90 + 28/80 = 118/80 - 118/80 simplified gives 59/40
- So, 90/80 + 7/20 = 59/40
In mixed form: 119/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+14/20 90/80+7/40 90/80+21/20 90/80+7/60 90/80+35/20 90/80+49/20