Add 21/25 and 15/8
1st number: 21/25, 2nd number: 1 7/8
21/25 + 15/8 is 543/200.
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,
15/8 = 15 × 25/8 × 25 = 375/200 - Add the two like fractions:
168/200 + 375/200 = 168 + 375/200 = 543/200 - So, 21/25 + 15/8 = 543/200
In mixed form: 2143/200
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+15/8 21/25+30/8 21/50+15/8 21/25+15/16 63/25+15/8 21/25+45/8 21/75+15/8 21/25+15/24 21/25+75/8 21/25+15/40 21/25+15/56