Add 81/2 and 25/20
1st number: 40 1/2, 2nd number: 1 5/20
81/2 + 25/20 is 167/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
81/2 = 81 × 10/2 × 10 = 810/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
25/20 = 25 × 1/20 × 1 = 25/20 - Add the two like fractions:
810/20 + 25/20 = 810 + 25/20 = 835/20 - 835/20 simplified gives 167/4
- So, 81/2 + 25/20 = 167/4
In mixed form: 413/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2+50/20 81/4+25/20 81/2+25/40 81/2+75/20 81/6+25/20 81/2+25/60 81/10+25/20 81/14+25/20