Add 40/90 and 90/80
1st number: 40/90, 2nd number: 1 10/80
40/90 + 90/80 is 113/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
40/90 = 40 × 8/90 × 8 = 320/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720 - Add the two like fractions:
320/720 + 810/720 = 320 + 810/720 = 1130/720 - 1130/720 simplified gives 113/72
- So, 40/90 + 90/80 = 113/72
In mixed form: 141/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+90/80