Add 20/25 and 8/21
20/25 + 8/21 is 124/105.
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,
20/25 = 20 × 21/25 × 21 = 420/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
8/21 = 8 × 25/21 × 25 = 200/525 - Add the two like fractions:
420/525 + 200/525 = 420 + 200/525 = 620/525 - 620/525 simplified gives 124/105
- So, 20/25 + 8/21 = 124/105
In mixed form: 119/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25+8/21 20/25+16/21 20/50+8/21 20/25+8/42 60/25+8/21 20/25+24/21 20/75+8/21 20/25+8/63 20/25+40/21 20/25+56/21