Add 40/4 and 72/9
1st number: 10 0/4, 2nd number: 8 0/9
40/4 + 72/9 is 18/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
40/4 = 40 × 9/4 × 9 = 360/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
72/9 = 72 × 4/9 × 4 = 288/36 - Add the two like fractions:
360/36 + 288/36 = 360 + 288/36 = 648/36 - 648/36 simplified gives 18/1
- So, 40/4 + 72/9 = 18/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4+72/9 40/8+72/9 40/4+72/18 40/12+72/9 40/4+72/27 40/20+72/9 40/4+72/45 40/28+72/9 40/4+72/63