Add 4/72 and 3/90
4/72 + 3/90 is 4/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 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 90 × 4 = 360,
3/90 = 3 × 4/90 × 4 = 12/360 - Add the two like fractions:
20/360 + 12/360 = 20 + 12/360 = 32/360 - 32/360 simplified gives 4/45
- So, 4/72 + 3/90 = 4/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/72+3/90 4/72+6/90 12/72+3/90 4/72+9/90 20/72+3/90 4/72+15/90 28/72+3/90 4/72+21/90