Add 4/45 and 40/80
4/45 + 40/80 is 53/90.
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,
4/45 = 4 × 16/45 × 16 = 64/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
40/80 = 40 × 9/80 × 9 = 360/720 - Add the two like fractions:
64/720 + 360/720 = 64 + 360/720 = 424/720 - 424/720 simplified gives 53/90
- So, 4/45 + 40/80 = 53/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/45+40/80 4/90+40/80 12/45+40/80 20/45+40/80 28/45+40/80