Add 15/4 and 45/40
1st number: 3 3/4, 2nd number: 1 5/40
15/4 + 45/40 is 39/8.
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,
45/40 = 45 × 1/40 × 1 = 45/40 - Add the two like fractions:
150/40 + 45/40 = 150 + 45/40 = 195/40 - 195/40 simplified gives 39/8
- So, 15/4 + 45/40 = 39/8
In mixed form: 47/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4+45/40 15/4+90/40 15/8+45/40 15/4+45/80 45/4+45/40 15/12+45/40 75/4+45/40 15/20+45/40 15/28+45/40