Add 72/18 and 10/40
1st number: 4 0/18, 2nd number: 10/40
72/18 + 10/40 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
72/18 = 72 × 20/18 × 20 = 1440/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Add the two like fractions:
1440/360 + 90/360 = 1440 + 90/360 = 1530/360 - 1530/360 simplified gives 17/4
- So, 72/18 + 10/40 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+20/40 72/36+10/40 72/18+10/80 72/18+30/40 72/54+10/40 72/18+50/40 72/90+10/40 72/18+70/40