Add 70/60 and 72/42
1st number: 1 10/60, 2nd number: 1 30/42
70/60 + 72/42 is 121/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
70/60 = 70 × 7/60 × 7 = 490/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
72/42 = 72 × 10/42 × 10 = 720/420 - Add the two like fractions:
490/420 + 720/420 = 490 + 720/420 = 1210/420 - 1210/420 simplified gives 121/42
- So, 70/60 + 72/42 = 121/42
In mixed form: 237/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/60+72/84