Add 70/21 and 8/80
1st number: 3 7/21, 2nd number: 8/80
70/21 + 8/80 is 103/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
70/21 = 70 × 80/21 × 80 = 5600/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
8/80 = 8 × 21/80 × 21 = 168/1680 - Add the two like fractions:
5600/1680 + 168/1680 = 5600 + 168/1680 = 5768/1680 - 5768/1680 simplified gives 103/30
- So, 70/21 + 8/80 = 103/30
In mixed form: 313/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+16/80 70/42+8/80 70/21+24/80 70/63+8/80 70/21+40/80 70/21+56/80