Add 72/10 and 42/9
1st number: 7 2/10, 2nd number: 4 6/9
72/10 + 42/9 is 178/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 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 9 × 10 = 90,
42/9 = 42 × 10/9 × 10 = 420/90 - Add the two like fractions:
648/90 + 420/90 = 648 + 420/90 = 1068/90 - 1068/90 simplified gives 178/15
- So, 72/10 + 42/9 = 178/15
In mixed form: 1113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10+84/9 72/20+42/9 72/10+42/18 72/30+42/9 72/10+42/27 72/50+42/9 72/10+42/45 72/70+42/9 72/10+42/63