Add 72/40 and 54/45
1st number: 1 32/40, 2nd number: 1 9/45
72/40 + 54/45 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
72/40 = 72 × 9/40 × 9 = 648/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
54/45 = 54 × 8/45 × 8 = 432/360 - Add the two like fractions:
648/360 + 432/360 = 648 + 432/360 = 1080/360 - 1080/360 simplified gives 3/1
- So, 72/40 + 54/45 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+54/45 72/40+54/90