Add 84/4 and 20/70
1st number: 21 0/4, 2nd number: 20/70
84/4 + 20/70 is 149/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
84/4 = 84 × 35/4 × 35 = 2940/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
20/70 = 20 × 2/70 × 2 = 40/140 - Add the two like fractions:
2940/140 + 40/140 = 2940 + 40/140 = 2980/140 - 2980/140 simplified gives 149/7
- So, 84/4 + 20/70 = 149/7
In mixed form: 212/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+40/70 84/8+20/70 84/4+60/70 84/12+20/70 84/20+20/70 84/28+20/70