Add 28/7 and 90/80
1st number: 4 0/7, 2nd number: 1 10/80
28/7 + 90/80 is 41/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
28/7 = 28 × 80/7 × 80 = 2240/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
90/80 = 90 × 7/80 × 7 = 630/560 - Add the two like fractions:
2240/560 + 630/560 = 2240 + 630/560 = 2870/560 - 2870/560 simplified gives 41/8
- So, 28/7 + 90/80 = 41/8
In mixed form: 51/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7+90/80 28/14+90/80 84/7+90/80 28/21+90/80 28/35+90/80 28/49+90/80