Add 45/30 and 45/70
1st number: 1 15/30, 2nd number: 45/70
45/30 + 45/70 is 15/7.
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,
45/30 = 45 × 7/30 × 7 = 315/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
45/70 = 45 × 3/70 × 3 = 135/210 - Add the two like fractions:
315/210 + 135/210 = 315 + 135/210 = 450/210 - 450/210 simplified gives 15/7
- So, 45/30 + 45/70 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+45/70 45/30+90/70 45/60+45/70 45/90+45/70