Add 7/8 and 72/20
1st number: 7/8, 2nd number: 3 12/20
7/8 + 72/20 is 179/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
7/8 = 7 × 5/8 × 5 = 35/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
72/20 = 72 × 2/20 × 2 = 144/40 - Add the two like fractions:
35/40 + 144/40 = 35 + 144/40 = 179/40 - So, 7/8 + 72/20 = 179/40
In mixed form: 419/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8+72/20 7/16+72/20 7/8+72/40 21/8+72/20 7/24+72/20 7/8+72/60 35/8+72/20 7/40+72/20 49/8+72/20 7/56+72/20