Add 30/40 and 25/7
1st number: 30/40, 2nd number: 3 4/7
30/40 + 25/7 is 121/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
30/40 = 30 × 7/40 × 7 = 210/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
25/7 = 25 × 40/7 × 40 = 1000/280 - Add the two like fractions:
210/280 + 1000/280 = 210 + 1000/280 = 1210/280 - 1210/280 simplified gives 121/28
- So, 30/40 + 25/7 = 121/28
In mixed form: 49/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+25/7 30/40+50/7 30/80+25/7 30/40+25/14 90/40+25/7 30/40+75/7 30/40+25/21 30/40+25/35 30/40+25/49