Add 10/90 and 90/42
1st number: 10/90, 2nd number: 2 6/42
10/90 + 90/42 is 142/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
10/90 = 10 × 7/90 × 7 = 70/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
90/42 = 90 × 15/42 × 15 = 1350/630 - Add the two like fractions:
70/630 + 1350/630 = 70 + 1350/630 = 1420/630 - 1420/630 simplified gives 142/63
- So, 10/90 + 90/42 = 142/63
In mixed form: 216/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90+90/42 10/90+90/84 30/90+90/42 50/90+90/42 70/90+90/42