Add 72/45 and 4/90
1st number: 1 27/45, 2nd number: 4/90
72/45 + 4/90 is 74/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
72/45 = 72 × 2/45 × 2 = 144/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
4/90 = 4 × 1/90 × 1 = 4/90 - Add the two like fractions:
144/90 + 4/90 = 144 + 4/90 = 148/90 - 148/90 simplified gives 74/45
- So, 72/45 + 4/90 = 74/45
In mixed form: 129/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45+8/90 72/90+4/90 72/45+12/90 72/45+20/90 72/45+28/90