Add 28/30 and 10/90
28/30 + 10/90 is 47/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
28/30 = 28 × 3/30 × 3 = 84/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
10/90 = 10 × 1/90 × 1 = 10/90 - Add the two like fractions:
84/90 + 10/90 = 84 + 10/90 = 94/90 - 94/90 simplified gives 47/45
- So, 28/30 + 10/90 = 47/45
In mixed form: 12/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+10/90 28/30+20/90 28/60+10/90 84/30+10/90 28/30+30/90 28/90+10/90 28/30+50/90 28/30+70/90