Add 72/8 and 12/90
1st number: 9 0/8, 2nd number: 12/90
72/8 + 12/90 is 137/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
72/8 = 72 × 45/8 × 45 = 3240/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
12/90 = 12 × 4/90 × 4 = 48/360 - Add the two like fractions:
3240/360 + 48/360 = 3240 + 48/360 = 3288/360 - 3288/360 simplified gives 137/15
- So, 72/8 + 12/90 = 137/15
In mixed form: 92/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/8+24/90 72/16+12/90 72/8+36/90 72/24+12/90 72/8+60/90 72/40+12/90 72/8+84/90 72/56+12/90