Add 7/20 and 40/72
7/20 + 40/72 is 163/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
7/20 = 7 × 18/20 × 18 = 126/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
40/72 = 40 × 5/72 × 5 = 200/360 - Add the two like fractions:
126/360 + 200/360 = 126 + 200/360 = 326/360 - 326/360 simplified gives 163/180
- So, 7/20 + 40/72 = 163/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20+40/72 7/20+80/72 7/40+40/72 21/20+40/72 7/60+40/72 35/20+40/72 49/20+40/72