Add 8/20 and 90/28
1st number: 8/20, 2nd number: 3 6/28
8/20 + 90/28 is 253/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
8/20 = 8 × 7/20 × 7 = 56/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Add the two like fractions:
56/140 + 450/140 = 56 + 450/140 = 506/140 - 506/140 simplified gives 253/70
- So, 8/20 + 90/28 = 253/70
In mixed form: 343/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20+90/28 8/40+90/28 8/20+90/56 24/20+90/28 8/60+90/28 8/20+90/84 40/20+90/28 56/20+90/28