Add 8/80 and 81/90
8/80 + 81/90 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
8/80 = 8 × 9/80 × 9 = 72/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
81/90 = 81 × 8/90 × 8 = 648/720 - Add the two like fractions:
72/720 + 648/720 = 72 + 648/720 = 720/720 - 720/720 simplified gives 1/1
- So, 8/80 + 81/90 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/80+81/90 24/80+81/90 40/80+81/90 56/80+81/90