Add 15/60 and 30/35
15/60 + 30/35 is 31/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
15/60 = 15 × 7/60 × 7 = 105/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
30/35 = 30 × 12/35 × 12 = 360/420 - Add the two like fractions:
105/420 + 360/420 = 105 + 360/420 = 465/420 - 465/420 simplified gives 31/28
- So, 15/60 + 30/35 = 31/28
In mixed form: 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/60+30/35 15/60+60/35 15/60+30/70 45/60+30/35 15/60+90/35 75/60+30/35