Add 28/90 and 25/45
28/90 + 25/45 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
25/45 = 25 × 2/45 × 2 = 50/90 - Add the two like fractions:
28/90 + 50/90 = 28 + 50/90 = 78/90 - 78/90 simplified gives 13/15
- So, 28/90 + 25/45 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+25/45 28/90+50/45 28/90+25/90 84/90+25/45 28/90+75/45