Add 18/90 and 16/20
18/90 + 16/20 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
16/20 = 16 × 9/20 × 9 = 144/180 - Add the two like fractions:
36/180 + 144/180 = 36 + 144/180 = 180/180 - 180/180 simplified gives 1/1
- So, 18/90 + 16/20 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+16/20 18/90+32/20 18/90+16/40 54/90+16/20 18/90+48/20 18/90+16/60 18/90+80/20