Add 7/42 and 70/40
1st number: 7/42, 2nd number: 1 30/40
7/42 + 70/40 is 23/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
7/42 = 7 × 20/42 × 20 = 140/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Add the two like fractions:
140/840 + 1470/840 = 140 + 1470/840 = 1610/840 - 1610/840 simplified gives 23/12
- So, 7/42 + 70/40 = 23/12
In mixed form: 111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+70/40 7/84+70/40 7/42+70/80 21/42+70/40 35/42+70/40 49/42+70/40