Add 81/9 and 90/40
1st number: 9 0/9, 2nd number: 2 10/40
81/9 + 90/40 is 45/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
81/9 = 81 × 40/9 × 40 = 3240/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Add the two like fractions:
3240/360 + 810/360 = 3240 + 810/360 = 4050/360 - 4050/360 simplified gives 45/4
- So, 81/9 + 90/40 = 45/4
In mixed form: 111/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+90/40 81/9+90/80 81/27+90/40 81/45+90/40 81/63+90/40