Add 72/10 and 80/90
1st number: 7 2/10, 2nd number: 80/90
72/10 + 80/90 is 364/45.
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,
80/90 = 80 × 1/90 × 1 = 80/90 - Add the two like fractions:
648/90 + 80/90 = 648 + 80/90 = 728/90 - 728/90 simplified gives 364/45
- So, 72/10 + 80/90 = 364/45
In mixed form: 84/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+80/90 72/30+80/90 72/50+80/90 72/70+80/90