Add 90/30 and 64/42
1st number: 3 0/30, 2nd number: 1 22/42
90/30 + 64/42 is 95/21.
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,
64/42 = 64 × 5/42 × 5 = 320/210 - Add the two like fractions:
630/210 + 320/210 = 630 + 320/210 = 950/210 - 950/210 simplified gives 95/21
- So, 90/30 + 64/42 = 95/21
In mixed form: 411/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+64/42 90/30+64/84