Add 70/42 and 90/60
1st number: 1 28/42, 2nd number: 1 30/60
70/42 + 90/60 is 19/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
70/42 = 70 × 10/42 × 10 = 700/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420 - Add the two like fractions:
700/420 + 630/420 = 700 + 630/420 = 1330/420 - 1330/420 simplified gives 19/6
- So, 70/42 + 90/60 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+90/60