Add 20/90 and 12/10
1st number: 20/90, 2nd number: 1 2/10
20/90 + 12/10 is 64/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
12/10 = 12 × 9/10 × 9 = 108/90 - Add the two like fractions:
20/90 + 108/90 = 20 + 108/90 = 128/90 - 128/90 simplified gives 64/45
- So, 20/90 + 12/10 = 64/45
In mixed form: 119/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+12/10 20/90+24/10 20/90+12/20 60/90+12/10 20/90+36/10 20/90+12/30 20/90+60/10 20/90+12/50 20/90+84/10 20/90+12/70