Add 4/5 and 45/90
4/5 + 45/90 is 13/10.
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,
4/5 = 4 × 18/5 × 18 = 72/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
45/90 = 45 × 1/90 × 1 = 45/90 - Add the two like fractions:
72/90 + 45/90 = 72 + 45/90 = 117/90 - 117/90 simplified gives 13/10
- So, 4/5 + 45/90 = 13/10
In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5+45/90 4/10+45/90 12/5+45/90 4/15+45/90 20/5+45/90 4/25+45/90 28/5+45/90 4/35+45/90