Add 4/72 and 1/45
4/72 + 1/45 is 7/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
4/72 = 4 × 5/72 × 5 = 20/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
1/45 = 1 × 8/45 × 8 = 8/360 - Add the two like fractions:
20/360 + 8/360 = 20 + 8/360 = 28/360 - 28/360 simplified gives 7/90
- So, 4/72 + 1/45 = 7/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/72+1/45 4/72+2/45 4/72+1/90 12/72+1/45 4/72+3/45 20/72+1/45 4/72+5/45 28/72+1/45 4/72+7/45