Add 9/4 and 72/40
1st number: 2 1/4, 2nd number: 1 32/40
9/4 + 72/40 is 81/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 4 × 10 = 40,
9/4 = 9 × 10/4 × 10 = 90/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
72/40 = 72 × 1/40 × 1 = 72/40 - Add the two like fractions:
90/40 + 72/40 = 90 + 72/40 = 162/40 - 162/40 simplified gives 81/20
- So, 9/4 + 72/40 = 81/20
In mixed form: 41/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/4+72/40 9/8+72/40 9/4+72/80 27/4+72/40 9/12+72/40 45/4+72/40 9/20+72/40 63/4+72/40 9/28+72/40