Add 15/90 and 1/40
15/90 + 1/40 is 23/120.
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,
15/90 = 15 × 4/90 × 4 = 60/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
1/40 = 1 × 9/40 × 9 = 9/360 - Add the two like fractions:
60/360 + 9/360 = 60 + 9/360 = 69/360 - 69/360 simplified gives 23/120
- So, 15/90 + 1/40 = 23/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+1/40 15/90+2/40 15/90+1/80 45/90+1/40 15/90+3/40 75/90+1/40 15/90+5/40 15/90+7/40