Add 24/80 and 3/21
24/80 + 3/21 is 31/70.
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,
24/80 = 24 × 21/80 × 21 = 504/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
3/21 = 3 × 80/21 × 80 = 240/1680 - Add the two like fractions:
504/1680 + 240/1680 = 504 + 240/1680 = 744/1680 - 744/1680 simplified gives 31/70
- So, 24/80 + 3/21 = 31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/80+3/21 24/80+6/21 24/80+3/42 72/80+3/21 24/80+9/21 24/80+3/63 24/80+15/21