Add 10/90 and 30/40
10/90 + 30/40 is 31/36.
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,
10/90 = 10 × 4/90 × 4 = 40/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Add the two like fractions:
40/360 + 270/360 = 40 + 270/360 = 310/360 - 310/360 simplified gives 31/36
- So, 10/90 + 30/40 = 31/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90+30/40 10/90+60/40 10/90+30/80 30/90+30/40 10/90+90/40 50/90+30/40 70/90+30/40