Add 72/98 and 70/21
1st number: 72/98, 2nd number: 3 7/21
72/98 + 70/21 is 598/147.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 21 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 98 × 3 = 294,
72/98 = 72 × 3/98 × 3 = 216/294 - Likewise, for the 2nd fraction, since 21 × 14 = 294,
70/21 = 70 × 14/21 × 14 = 980/294 - Add the two like fractions:
216/294 + 980/294 = 216 + 980/294 = 1196/294 - 1196/294 simplified gives 598/147
- So, 72/98 + 70/21 = 598/147
In mixed form: 410/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/98+70/42 72/98+70/63