Add 25/42 and 7/90
25/42 + 7/90 is 212/315.
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,
25/42 = 25 × 15/42 × 15 = 375/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Add the two like fractions:
375/630 + 49/630 = 375 + 49/630 = 424/630 - 424/630 simplified gives 212/315
- So, 25/42 + 7/90 = 212/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+7/90 25/42+14/90 25/84+7/90 75/42+7/90 25/42+21/90 25/42+35/90 25/42+49/90