Add 90/42 and 60/90
1st number: 2 6/42, 2nd number: 60/90
90/42 + 60/90 is 59/21.
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,
90/42 = 90 × 15/42 × 15 = 1350/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
60/90 = 60 × 7/90 × 7 = 420/630 - Add the two like fractions:
1350/630 + 420/630 = 1350 + 420/630 = 1770/630 - 1770/630 simplified gives 59/21
- So, 90/42 + 60/90 = 59/21
In mixed form: 217/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+60/90