Add 21/25 and 72/20
1st number: 21/25, 2nd number: 3 12/20
21/25 + 72/20 is 111/25.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 25 × 4 = 100,
21/25 = 21 × 4/25 × 4 = 84/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
72/20 = 72 × 5/20 × 5 = 360/100 - Add the two like fractions:
84/100 + 360/100 = 84 + 360/100 = 444/100 - 444/100 simplified gives 111/25
- So, 21/25 + 72/20 = 111/25
In mixed form: 411/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+72/20 21/50+72/20 21/25+72/40 63/25+72/20 21/75+72/20 21/25+72/60