Add 45/60 and 30/70
45/60 + 30/70 is 33/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
45/60 = 45 × 7/60 × 7 = 315/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
30/70 = 30 × 6/70 × 6 = 180/420 - Add the two like fractions:
315/420 + 180/420 = 315 + 180/420 = 495/420 - 495/420 simplified gives 33/28
- So, 45/60 + 30/70 = 33/28
In mixed form: 15/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+30/70 45/60+60/70 45/60+90/70