Add 40/45 and 54/80
40/45 + 54/80 is 563/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
40/45 = 40 × 16/45 × 16 = 640/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
54/80 = 54 × 9/80 × 9 = 486/720 - Add the two like fractions:
640/720 + 486/720 = 640 + 486/720 = 1126/720 - 1126/720 simplified gives 563/360
- So, 40/45 + 54/80 = 563/360
In mixed form: 1203/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/45+54/80 40/90+54/80