Add 70/40 and 21/4
1st number: 1 30/40, 2nd number: 5 1/4
70/40 + 21/4 is 7/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 4 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
70/40 = 70 × 1/40 × 1 = 70/40 - Likewise, for the 2nd fraction, since 4 × 10 = 40,
21/4 = 21 × 10/4 × 10 = 210/40 - Add the two like fractions:
70/40 + 210/40 = 70 + 210/40 = 280/40 - 280/40 simplified gives 7/1
- So, 70/40 + 21/4 = 7/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+42/4 70/80+21/4 70/40+21/8 70/40+63/4 70/40+21/12 70/40+21/20 70/40+21/28