Add 40/21 and 2/80
1st number: 1 19/21, 2nd number: 2/80
40/21 + 2/80 is 1621/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
40/21 = 40 × 80/21 × 80 = 3200/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
2/80 = 2 × 21/80 × 21 = 42/1680 - Add the two like fractions:
3200/1680 + 42/1680 = 3200 + 42/1680 = 3242/1680 - 3242/1680 simplified gives 1621/840
- So, 40/21 + 2/80 = 1621/840
In mixed form: 1781/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+2/80 40/21+4/80 40/42+2/80 40/21+6/80 40/63+2/80 40/21+10/80 40/21+14/80