Add 75/20 and 20/45
1st number: 3 15/20, 2nd number: 20/45
75/20 + 20/45 is 151/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
75/20 = 75 × 9/20 × 9 = 675/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Add the two like fractions:
675/180 + 80/180 = 675 + 80/180 = 755/180 - 755/180 simplified gives 151/36
- So, 75/20 + 20/45 = 151/36
In mixed form: 47/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/20+40/45 75/40+20/45 75/20+20/90 75/20+60/45 75/60+20/45