Add 1/80 and 8/21
1/80 + 8/21 is 661/1680.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
1/80 = 1 × 21/80 × 21 = 21/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
8/21 = 8 × 80/21 × 80 = 640/1680 - Add the two like fractions:
21/1680 + 640/1680 = 21 + 640/1680 = 661/1680 - So, 1/80 + 8/21 = 661/1680
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/80+8/21 1/80+16/21 1/80+8/42 3/80+8/21 1/80+24/21 1/80+8/63 5/80+8/21 1/80+40/21 7/80+8/21 1/80+56/21