Add 15/2 and 90/40
1st number: 7 1/2, 2nd number: 2 10/40
15/2 + 90/40 is 39/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
15/2 = 15 × 20/2 × 20 = 300/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
90/40 = 90 × 1/40 × 1 = 90/40 - Add the two like fractions:
300/40 + 90/40 = 300 + 90/40 = 390/40 - 390/40 simplified gives 39/4
- So, 15/2 + 90/40 = 39/4
In mixed form: 93/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2+90/40 15/4+90/40 15/2+90/80 45/2+90/40 15/6+90/40 75/2+90/40 15/10+90/40 15/14+90/40