Add 40/30 and 40/70
1st number: 1 10/30, 2nd number: 40/70
40/30 + 40/70 is 40/21.
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,
40/30 = 40 × 7/30 × 7 = 280/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Add the two like fractions:
280/210 + 120/210 = 280 + 120/210 = 400/210 - 400/210 simplified gives 40/21
- So, 40/30 + 40/70 = 40/21
In mixed form: 119/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30+40/70 40/30+80/70 40/60+40/70 40/90+40/70