Add 28/25 and 45/21
1st number: 1 3/25, 2nd number: 2 3/21
28/25 + 45/21 is 571/175.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
28/25 = 28 × 21/25 × 21 = 588/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
45/21 = 45 × 25/21 × 25 = 1125/525 - Add the two like fractions:
588/525 + 1125/525 = 588 + 1125/525 = 1713/525 - 1713/525 simplified gives 571/175
- So, 28/25 + 45/21 = 571/175
In mixed form: 346/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/25+45/21 28/25+90/21 28/50+45/21 28/25+45/42 84/25+45/21 28/75+45/21 28/25+45/63