Add 90/20 and 72/8
1st number: 4 10/20, 2nd number: 9 0/8
90/20 + 72/8 is 27/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
90/20 = 90 × 2/20 × 2 = 180/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
72/8 = 72 × 5/8 × 5 = 360/40 - Add the two like fractions:
180/40 + 360/40 = 180 + 360/40 = 540/40 - 540/40 simplified gives 27/2
- So, 90/20 + 72/8 = 27/2
In mixed form: 131/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+72/8 90/20+72/16 90/60+72/8 90/20+72/24 90/20+72/40 90/20+72/56