Add 5/45 and 12/72
5/45 + 12/72 is 5/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
5/45 = 5 × 8/45 × 8 = 40/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
12/72 = 12 × 5/72 × 5 = 60/360 - Add the two like fractions:
40/360 + 60/360 = 40 + 60/360 = 100/360 - 100/360 simplified gives 5/18
- So, 5/45 + 12/72 = 5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/45+12/72 5/45+24/72 5/90+12/72 15/45+12/72 5/45+36/72 25/45+12/72 5/45+60/72 35/45+12/72 5/45+84/72