Add 90/16 and 70/20
1st number: 5 10/16, 2nd number: 3 10/20
90/16 + 70/20 is 73/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
90/16 = 90 × 5/16 × 5 = 450/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
70/20 = 70 × 4/20 × 4 = 280/80 - Add the two like fractions:
450/80 + 280/80 = 450 + 280/80 = 730/80 - 730/80 simplified gives 73/8
- So, 90/16 + 70/20 = 73/8
In mixed form: 91/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/32+70/20 90/16+70/40 90/48+70/20 90/16+70/60 90/80+70/20