Add 21/70 and 70/36
1st number: 21/70, 2nd number: 1 34/36
21/70 + 70/36 is 101/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 36 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 70 × 18 = 1260,
21/70 = 21 × 18/70 × 18 = 378/1260 - Likewise, for the 2nd fraction, since 36 × 35 = 1260,
70/36 = 70 × 35/36 × 35 = 2450/1260 - Add the two like fractions:
378/1260 + 2450/1260 = 378 + 2450/1260 = 2828/1260 - 2828/1260 simplified gives 101/45
- So, 21/70 + 70/36 = 101/45
In mixed form: 211/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+70/36 21/70+70/72 63/70+70/36