Add 70/40 and 21/8
1st number: 1 30/40, 2nd number: 2 5/8
70/40 + 21/8 is 35/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
70/40 = 70 × 1/40 × 1 = 70/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
21/8 = 21 × 5/8 × 5 = 105/40 - Add the two like fractions:
70/40 + 105/40 = 70 + 105/40 = 175/40 - 175/40 simplified gives 35/8
- So, 70/40 + 21/8 = 35/8
In mixed form: 43/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+42/8 70/80+21/8 70/40+21/16 70/40+63/8 70/40+21/24 70/40+21/40 70/40+21/56