Add 10/45 and 5/20
10/45 + 5/20 is 17/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
10/45 = 10 × 4/45 × 4 = 40/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Add the two like fractions:
40/180 + 45/180 = 40 + 45/180 = 85/180 - 85/180 simplified gives 17/36
- So, 10/45 + 5/20 = 17/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/45+5/20 10/45+10/20 10/90+5/20 10/45+5/40 30/45+5/20 10/45+15/20 10/45+5/60 50/45+5/20 10/45+25/20 70/45+5/20 10/45+35/20