Add 90/30 and 4/42
1st number: 3 0/30, 2nd number: 4/42
90/30 + 4/42 is 65/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
90/30 = 90 × 7/30 × 7 = 630/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
4/42 = 4 × 5/42 × 5 = 20/210 - Add the two like fractions:
630/210 + 20/210 = 630 + 20/210 = 650/210 - 650/210 simplified gives 65/21
- So, 90/30 + 4/42 = 65/21
In mixed form: 32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+8/42 90/60+4/42 90/30+4/84 90/30+12/42 90/30+20/42 90/30+28/42