Add 90/12 and 5/80
1st number: 7 6/12, 2nd number: 5/80
90/12 + 5/80 is 121/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
90/12 = 90 × 20/12 × 20 = 1800/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
5/80 = 5 × 3/80 × 3 = 15/240 - Add the two like fractions:
1800/240 + 15/240 = 1800 + 15/240 = 1815/240 - 1815/240 simplified gives 121/16
- So, 90/12 + 5/80 = 121/16
In mixed form: 79/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+10/80 90/24+5/80 90/12+15/80 90/36+5/80 90/12+25/80 90/60+5/80 90/12+35/80 90/84+5/80