Add 70/42 and 56/90
1st number: 1 28/42, 2nd number: 56/90
70/42 + 56/90 is 103/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
70/42 = 70 × 15/42 × 15 = 1050/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
56/90 = 56 × 7/90 × 7 = 392/630 - Add the two like fractions:
1050/630 + 392/630 = 1050 + 392/630 = 1442/630 - 1442/630 simplified gives 103/45
- So, 70/42 + 56/90 = 103/45
In mixed form: 213/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+56/90