Add 28/20 and 25/45
1st number: 1 8/20, 2nd number: 25/45
28/20 + 25/45 is 88/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
28/20 = 28 × 9/20 × 9 = 252/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
25/45 = 25 × 4/45 × 4 = 100/180 - Add the two like fractions:
252/180 + 100/180 = 252 + 100/180 = 352/180 - 352/180 simplified gives 88/45
- So, 28/20 + 25/45 = 88/45
In mixed form: 143/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20+25/45 28/20+50/45 28/40+25/45 28/20+25/90 84/20+25/45 28/20+75/45 28/60+25/45