Add 90/70 and 24/42
1st number: 1 20/70, 2nd number: 24/42
90/70 + 24/42 is 13/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
24/42 = 24 × 5/42 × 5 = 120/210 - Add the two like fractions:
270/210 + 120/210 = 270 + 120/210 = 390/210 - 390/210 simplified gives 13/7
- So, 90/70 + 24/42 = 13/7
In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+48/42 90/70+24/84 90/70+72/42