Add 1/80 and 1/42
1/80 + 1/42 is 61/1680.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 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 42 × 40 = 1680,
1/42 = 1 × 40/42 × 40 = 40/1680 - Add the two like fractions:
21/1680 + 40/1680 = 21 + 40/1680 = 61/1680 - So, 1/80 + 1/42 = 61/1680
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/80+1/42 1/80+2/42 1/80+1/84 3/80+1/42 1/80+3/42 5/80+1/42 1/80+5/42 7/80+1/42 1/80+7/42