Add 5/4 and 72/90
1st number: 1 1/4, 2nd number: 72/90
5/4 + 72/90 is 41/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
5/4 = 5 × 45/4 × 45 = 225/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
72/90 = 72 × 2/90 × 2 = 144/180 - Add the two like fractions:
225/180 + 144/180 = 225 + 144/180 = 369/180 - 369/180 simplified gives 41/20
- So, 5/4 + 72/90 = 41/20
In mixed form: 21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/4+72/90 5/8+72/90 15/4+72/90 5/12+72/90 25/4+72/90 5/20+72/90 35/4+72/90 5/28+72/90