Add 21/98 and 25/42
21/98 + 25/42 is 17/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 42 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 98 × 3 = 294,
21/98 = 21 × 3/98 × 3 = 63/294 - Likewise, for the 2nd fraction, since 42 × 7 = 294,
25/42 = 25 × 7/42 × 7 = 175/294 - Add the two like fractions:
63/294 + 175/294 = 63 + 175/294 = 238/294 - 238/294 simplified gives 17/21
- So, 21/98 + 25/42 = 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+25/42 21/98+50/42 21/98+25/84 63/98+25/42 21/98+75/42