Add 98/90 and 28/40
1st number: 1 8/90, 2nd number: 28/40
98/90 + 28/40 is 161/90.
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,
98/90 = 98 × 4/90 × 4 = 392/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
392/360 + 252/360 = 392 + 252/360 = 644/360 - 644/360 simplified gives 161/90
- So, 98/90 + 28/40 = 161/90
In mixed form: 171/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/90+56/40 98/90+28/80 98/90+84/40