Add 30/72 and 80/45
1st number: 30/72, 2nd number: 1 35/45
30/72 + 80/45 is 79/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
30/72 = 30 × 5/72 × 5 = 150/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
80/45 = 80 × 8/45 × 8 = 640/360 - Add the two like fractions:
150/360 + 640/360 = 150 + 640/360 = 790/360 - 790/360 simplified gives 79/36
- So, 30/72 + 80/45 = 79/36
In mixed form: 27/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72+80/45 30/72+80/90 90/72+80/45