Add 9/40 and 80/90
9/40 + 80/90 is 401/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
80/90 = 80 × 4/90 × 4 = 320/360 - Add the two like fractions:
81/360 + 320/360 = 81 + 320/360 = 401/360 - So, 9/40 + 80/90 = 401/360
In mixed form: 141/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+80/90 9/80+80/90 27/40+80/90 45/40+80/90 63/40+80/90