Add 20/30 and 75/70
1st number: 20/30, 2nd number: 1 5/70
20/30 + 75/70 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
20/30 = 20 × 7/30 × 7 = 140/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
75/70 = 75 × 3/70 × 3 = 225/210 - Add the two like fractions:
140/210 + 225/210 = 140 + 225/210 = 365/210 - 365/210 simplified gives 73/42
- So, 20/30 + 75/70 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30+75/70 20/60+75/70 60/30+75/70 20/90+75/70