Add 4/90 and 28/72
4/90 + 28/72 is 13/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
4/90 = 4 × 4/90 × 4 = 16/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Add the two like fractions:
16/360 + 140/360 = 16 + 140/360 = 156/360 - 156/360 simplified gives 13/30
- So, 4/90 + 28/72 = 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+28/72 4/90+56/72 12/90+28/72 4/90+84/72 20/90+28/72 28/90+28/72