Add 9/40 and 45/81
9/40 + 45/81 is 281/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
9/40 = 9 × 81/40 × 81 = 729/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
45/81 = 45 × 40/81 × 40 = 1800/3240 - Add the two like fractions:
729/3240 + 1800/3240 = 729 + 1800/3240 = 2529/3240 - 2529/3240 simplified gives 281/360
- So, 9/40 + 45/81 = 281/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+45/81 9/40+90/81 9/80+45/81 27/40+45/81 45/40+45/81 63/40+45/81