Add 15/90 and 50/40
1st number: 15/90, 2nd number: 1 10/40
15/90 + 50/40 is 17/12.
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,
15/90 = 15 × 4/90 × 4 = 60/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
50/40 = 50 × 9/40 × 9 = 450/360 - Add the two like fractions:
60/360 + 450/360 = 60 + 450/360 = 510/360 - 510/360 simplified gives 17/12
- So, 15/90 + 50/40 = 17/12
In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+50/40 15/90+50/80 45/90+50/40 75/90+50/40