Add 15/45 and 7/20
15/45 + 7/20 is 41/60.
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,
15/45 = 15 × 4/45 × 4 = 60/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Add the two like fractions:
60/180 + 63/180 = 60 + 63/180 = 123/180 - 123/180 simplified gives 41/60
- So, 15/45 + 7/20 = 41/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+7/20 15/45+14/20 15/90+7/20 15/45+7/40 15/45+21/20 15/45+7/60 75/45+7/20 15/45+35/20 15/45+49/20