Add 5/45 and 21/72
5/45 + 21/72 is 29/72.
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,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
40/360 + 105/360 = 40 + 105/360 = 145/360 - 145/360 simplified gives 29/72
- So, 5/45 + 21/72 = 29/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/45+21/72 5/45+42/72 5/90+21/72 15/45+21/72 5/45+63/72 25/45+21/72 35/45+21/72