Add 20/30 and 45/4
1st number: 20/30, 2nd number: 11 1/4
20/30 + 45/4 is 143/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
20/30 = 20 × 2/30 × 2 = 40/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
45/4 = 45 × 15/4 × 15 = 675/60 - Add the two like fractions:
40/60 + 675/60 = 40 + 675/60 = 715/60 - 715/60 simplified gives 143/12
- So, 20/30 + 45/4 = 143/12
In mixed form: 1111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30+45/4 20/30+90/4 20/60+45/4 20/30+45/8 60/30+45/4 20/90+45/4 20/30+45/12 20/30+45/20 20/30+45/28