Add 12/49 and 72/90
12/49 + 72/90 is 256/245.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 49 × 90 = 4410,
12/49 = 12 × 90/49 × 90 = 1080/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
72/90 = 72 × 49/90 × 49 = 3528/4410 - Add the two like fractions:
1080/4410 + 3528/4410 = 1080 + 3528/4410 = 4608/4410 - 4608/4410 simplified gives 256/245
- So, 12/49 + 72/90 = 256/245
In mixed form: 111/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/49+72/90 12/98+72/90 36/49+72/90 60/49+72/90 84/49+72/90