Add 3/90 and 9/40
3/90 + 9/40 is 31/120.
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,
3/90 = 3 × 4/90 × 4 = 12/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Add the two like fractions:
12/360 + 81/360 = 12 + 81/360 = 93/360 - 93/360 simplified gives 31/120
- So, 3/90 + 9/40 = 31/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90+9/40 3/90+18/40 3/90+9/80 9/90+9/40 3/90+27/40 15/90+9/40 3/90+45/40 21/90+9/40 3/90+63/40