Add 21/5 and 4/90
1st number: 4 1/5, 2nd number: 4/90
21/5 + 4/90 is 191/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
4/90 = 4 × 1/90 × 1 = 4/90 - Add the two like fractions:
378/90 + 4/90 = 378 + 4/90 = 382/90 - 382/90 simplified gives 191/45
- So, 21/5 + 4/90 = 191/45
In mixed form: 411/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+4/90 21/5+8/90 21/10+4/90 63/5+4/90 21/5+12/90 21/15+4/90 21/5+20/90 21/25+4/90 21/5+28/90 21/35+4/90