Add 21/7 and 75/60
1st number: 3 0/7, 2nd number: 1 15/60
21/7 + 75/60 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 7 × 60 = 420,
21/7 = 21 × 60/7 × 60 = 1260/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
75/60 = 75 × 7/60 × 7 = 525/420 - Add the two like fractions:
1260/420 + 525/420 = 1260 + 525/420 = 1785/420 - 1785/420 simplified gives 17/4
- So, 21/7 + 75/60 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+75/60 21/14+75/60 63/7+75/60 21/35+75/60 21/49+75/60