Add 21/25 and 7/8
21/25 + 7/8 is 343/200.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 8 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 25 × 8 = 200,
21/25 = 21 × 8/25 × 8 = 168/200 - Likewise, for the 2nd fraction, since 8 × 25 = 200,
7/8 = 7 × 25/8 × 25 = 175/200 - Add the two like fractions:
168/200 + 175/200 = 168 + 175/200 = 343/200 - So, 21/25 + 7/8 = 343/200
In mixed form: 1143/200
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+7/8 21/25+14/8 21/50+7/8 21/25+7/16 63/25+7/8 21/25+21/8 21/75+7/8 21/25+7/24 21/25+35/8 21/25+7/40 21/25+49/8 21/25+7/56