Add 7/4 and 72/20
1st number: 1 3/4, 2nd number: 3 12/20
7/4 + 72/20 is 107/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
7/4 = 7 × 5/4 × 5 = 35/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
72/20 = 72 × 1/20 × 1 = 72/20 - Add the two like fractions:
35/20 + 72/20 = 35 + 72/20 = 107/20 - So, 7/4 + 72/20 = 107/20
In mixed form: 57/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4+72/20 7/8+72/20 7/4+72/40 21/4+72/20 7/12+72/20 7/4+72/60 35/4+72/20 7/20+72/20 49/4+72/20 7/28+72/20