Add 90/20 and 18/32
1st number: 4 10/20, 2nd number: 18/32
90/20 + 18/32 is 81/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 32 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 20 × 8 = 160,
90/20 = 90 × 8/20 × 8 = 720/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
18/32 = 18 × 5/32 × 5 = 90/160 - Add the two like fractions:
720/160 + 90/160 = 720 + 90/160 = 810/160 - 810/160 simplified gives 81/16
- So, 90/20 + 18/32 = 81/16
In mixed form: 51/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+36/32 90/40+18/32 90/20+18/64 90/20+54/32 90/60+18/32 90/20+18/96 90/20+90/32