Add 7/90 and 28/40
7/90 + 28/40 is 7/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
7/90 = 7 × 4/90 × 4 = 28/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
28/360 + 252/360 = 28 + 252/360 = 280/360 - 280/360 simplified gives 7/9
- So, 7/90 + 28/40 = 7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90+28/40 7/90+56/40 7/90+28/80 21/90+28/40 7/90+84/40 35/90+28/40 49/90+28/40