Add 15/30 and 40/7
1st number: 15/30, 2nd number: 5 5/7
15/30 + 40/7 is 87/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
15/30 = 15 × 7/30 × 7 = 105/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
40/7 = 40 × 30/7 × 30 = 1200/210 - Add the two like fractions:
105/210 + 1200/210 = 105 + 1200/210 = 1305/210 - 1305/210 simplified gives 87/14
- So, 15/30 + 40/7 = 87/14
In mixed form: 63/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+80/7 15/60+40/7 15/30+40/14 45/30+40/7 15/90+40/7 15/30+40/21 75/30+40/7 15/30+40/35 15/30+40/49