Add 21/20 and 8/40
1st number: 1 1/20, 2nd number: 8/40
21/20 + 8/40 is 5/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
21/20 = 21 × 2/20 × 2 = 42/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
8/40 = 8 × 1/40 × 1 = 8/40 - Add the two like fractions:
42/40 + 8/40 = 42 + 8/40 = 50/40 - 50/40 simplified gives 5/4
- So, 21/20 + 8/40 = 5/4
In mixed form: 11/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+8/40 21/20+16/40 21/40+8/40 21/20+8/80 63/20+8/40 21/20+24/40 21/60+8/40 21/20+56/40