Add 75/7 and 72/20
1st number: 10 5/7, 2nd number: 3 12/20
75/7 + 72/20 is 501/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
75/7 = 75 × 20/7 × 20 = 1500/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
72/20 = 72 × 7/20 × 7 = 504/140 - Add the two like fractions:
1500/140 + 504/140 = 1500 + 504/140 = 2004/140 - 2004/140 simplified gives 501/35
- So, 75/7 + 72/20 = 501/35
In mixed form: 1411/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/14+72/20 75/7+72/40 75/21+72/20 75/7+72/60 75/35+72/20 75/49+72/20