Add 20/84 and 70/25
1st number: 20/84, 2nd number: 2 20/25
20/84 + 70/25 is 319/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
20/84 = 20 × 25/84 × 25 = 500/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
70/25 = 70 × 84/25 × 84 = 5880/2100 - Add the two like fractions:
500/2100 + 5880/2100 = 500 + 5880/2100 = 6380/2100 - 6380/2100 simplified gives 319/105
- So, 20/84 + 70/25 = 319/105
In mixed form: 34/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+70/25 20/84+70/50 60/84+70/25 20/84+70/75