Add 9/72 and 16/40
9/72 + 16/40 is 21/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
9/72 = 9 × 5/72 × 5 = 45/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
16/40 = 16 × 9/40 × 9 = 144/360 - Add the two like fractions:
45/360 + 144/360 = 45 + 144/360 = 189/360 - 189/360 simplified gives 21/40
- So, 9/72 + 16/40 = 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/72+16/40 9/72+32/40 9/72+16/80 27/72+16/40 9/72+48/40 45/72+16/40 9/72+80/40 63/72+16/40