Add 15/4 and 20/40
1st number: 3 3/4, 2nd number: 20/40
15/4 + 20/40 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 4 × 10 = 40,
15/4 = 15 × 10/4 × 10 = 150/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
20/40 = 20 × 1/40 × 1 = 20/40 - Add the two like fractions:
150/40 + 20/40 = 150 + 20/40 = 170/40 - 170/40 simplified gives 17/4
- So, 15/4 + 20/40 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4+20/40 15/8+20/40 15/4+20/80 45/4+20/40 15/4+60/40 15/12+20/40 75/4+20/40 15/20+20/40 15/28+20/40