Add 81/2 and 28/40
1st number: 40 1/2, 2nd number: 28/40
81/2 + 28/40 is 206/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
81/2 = 81 × 20/2 × 20 = 1620/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
28/40 = 28 × 1/40 × 1 = 28/40 - Add the two like fractions:
1620/40 + 28/40 = 1620 + 28/40 = 1648/40 - 1648/40 simplified gives 206/5
- So, 81/2 + 28/40 = 206/5
In mixed form: 411/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2+56/40 81/4+28/40 81/2+28/80 81/2+84/40 81/6+28/40 81/10+28/40 81/14+28/40