Add 20/72 and 16/90
20/72 + 16/90 is 41/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
20/72 = 20 × 5/72 × 5 = 100/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
16/90 = 16 × 4/90 × 4 = 64/360 - Add the two like fractions:
100/360 + 64/360 = 100 + 64/360 = 164/360 - 164/360 simplified gives 41/90
- So, 20/72 + 16/90 = 41/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72+16/90 20/72+32/90 60/72+16/90 20/72+48/90 20/72+80/90