Add 20/5 and 20/72
1st number: 4 0/5, 2nd number: 20/72
20/5 + 20/72 is 77/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
20/5 = 20 × 72/5 × 72 = 1440/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
20/72 = 20 × 5/72 × 5 = 100/360 - Add the two like fractions:
1440/360 + 100/360 = 1440 + 100/360 = 1540/360 - 1540/360 simplified gives 77/18
- So, 20/5 + 20/72 = 77/18
In mixed form: 45/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+20/72 20/5+40/72 20/10+20/72 60/5+20/72 20/5+60/72 20/15+20/72 20/25+20/72 20/35+20/72