Add 90/8 and 90/20
1st number: 11 2/8, 2nd number: 4 10/20
90/8 + 90/20 is 63/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
90/20 = 90 × 2/20 × 2 = 180/40 - Add the two like fractions:
450/40 + 180/40 = 450 + 180/40 = 630/40 - 630/40 simplified gives 63/4
- So, 90/8 + 90/20 = 63/4
In mixed form: 153/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/16+90/20 90/8+90/40 90/24+90/20 90/8+90/60 90/40+90/20 90/56+90/20