Add 20/10 and 45/9
1st number: 2 0/10, 2nd number: 5 0/9
20/10 + 45/9 is 7/1.
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,
20/10 = 20 × 9/10 × 9 = 180/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
45/9 = 45 × 10/9 × 10 = 450/90 - Add the two like fractions:
180/90 + 450/90 = 180 + 450/90 = 630/90 - 630/90 simplified gives 7/1
- So, 20/10 + 45/9 = 7/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10+45/9 20/10+90/9 20/10+45/18 60/10+45/9 20/30+45/9 20/10+45/27 20/50+45/9 20/70+45/9 20/10+45/63