Add 72/10 and 7/90
1st number: 7 2/10, 2nd number: 7/90
72/10 + 7/90 is 131/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
72/10 = 72 × 9/10 × 9 = 648/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
7/90 = 7 × 1/90 × 1 = 7/90 - Add the two like fractions:
648/90 + 7/90 = 648 + 7/90 = 655/90 - 655/90 simplified gives 131/18
- So, 72/10 + 7/90 = 131/18
In mixed form: 75/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10+14/90 72/20+7/90 72/10+21/90 72/30+7/90 72/10+35/90 72/50+7/90 72/10+49/90 72/70+7/90