Add 1/90 and 30/42
1/90 + 30/42 is 457/630.
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,
1/90 = 1 × 7/90 × 7 = 7/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
30/42 = 30 × 15/42 × 15 = 450/630 - Add the two like fractions:
7/630 + 450/630 = 7 + 450/630 = 457/630 - So, 1/90 + 30/42 = 457/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90+30/42 1/90+60/42 1/90+30/84 3/90+30/42 1/90+90/42 5/90+30/42 7/90+30/42