Add 4/21 and 98/40
1st number: 4/21, 2nd number: 2 18/40
4/21 + 98/40 is 1109/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
4/21 = 4 × 40/21 × 40 = 160/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
98/40 = 98 × 21/40 × 21 = 2058/840 - Add the two like fractions:
160/840 + 2058/840 = 160 + 2058/840 = 2218/840 - 2218/840 simplified gives 1109/420
- So, 4/21 + 98/40 = 1109/420
In mixed form: 2269/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+98/40 4/42+98/40 4/21+98/80 12/21+98/40 4/63+98/40 20/21+98/40 28/21+98/40