Add 45/90 and 12/15
45/90 + 12/15 is 13/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
45/90 = 45 × 1/90 × 1 = 45/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
12/15 = 12 × 6/15 × 6 = 72/90 - Add the two like fractions:
45/90 + 72/90 = 45 + 72/90 = 117/90 - 117/90 simplified gives 13/10
- So, 45/90 + 12/15 = 13/10
In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 45/90+24/15 45/90+12/30 45/90+36/15 45/90+12/45 45/90+60/15 45/90+12/75 45/90+84/15