Add 90/12 and 12/40
1st number: 7 6/12, 2nd number: 12/40
90/12 + 12/40 is 39/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
90/12 = 90 × 10/12 × 10 = 900/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
12/40 = 12 × 3/40 × 3 = 36/120 - Add the two like fractions:
900/120 + 36/120 = 900 + 36/120 = 936/120 - 936/120 simplified gives 39/5
- So, 90/12 + 12/40 = 39/5
In mixed form: 74/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+24/40 90/24+12/40 90/12+12/80 90/12+36/40 90/36+12/40 90/12+60/40 90/60+12/40 90/12+84/40 90/84+12/40