Add 84/20 and 12/40
1st number: 4 4/20, 2nd number: 12/40
84/20 + 12/40 is 9/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
84/20 = 84 × 2/20 × 2 = 168/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
12/40 = 12 × 1/40 × 1 = 12/40 - Add the two like fractions:
168/40 + 12/40 = 168 + 12/40 = 180/40 - 180/40 simplified gives 9/2
- So, 84/20 + 12/40 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+24/40 84/40+12/40 84/20+12/80 84/20+36/40 84/60+12/40 84/20+60/40 84/20+84/40