Add 36/90 and 30/42
36/90 + 30/42 is 39/35.
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,
36/90 = 36 × 7/90 × 7 = 252/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
30/42 = 30 × 15/42 × 15 = 450/630 - Add the two like fractions:
252/630 + 450/630 = 252 + 450/630 = 702/630 - 702/630 simplified gives 39/35
- So, 36/90 + 30/42 = 39/35
In mixed form: 14/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90+30/42 36/90+60/42 36/90+30/84 36/90+90/42