Add 45/50 and 20/70
45/50 + 20/70 is 83/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
45/50 = 45 × 7/50 × 7 = 315/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
20/70 = 20 × 5/70 × 5 = 100/350 - Add the two like fractions:
315/350 + 100/350 = 315 + 100/350 = 415/350 - 415/350 simplified gives 83/70
- So, 45/50 + 20/70 = 83/70
In mixed form: 113/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50+20/70 45/50+40/70 45/50+60/70