Add 70/20 and 90/5
1st number: 3 10/20, 2nd number: 18 0/5
70/20 + 90/5 is 43/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
70/20 = 70 × 1/20 × 1 = 70/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
90/5 = 90 × 4/5 × 4 = 360/20 - Add the two like fractions:
70/20 + 360/20 = 70 + 360/20 = 430/20 - 430/20 simplified gives 43/2
- So, 70/20 + 90/5 = 43/2
In mixed form: 211/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+90/5 70/20+90/10 70/60+90/5 70/20+90/15 70/20+90/25 70/20+90/35