Add 90/42 and 72/35
1st number: 2 6/42, 2nd number: 2 2/35
90/42 + 72/35 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
90/42 = 90 × 5/42 × 5 = 450/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
72/35 = 72 × 6/35 × 6 = 432/210 - Add the two like fractions:
450/210 + 432/210 = 450 + 432/210 = 882/210 - 882/210 simplified gives 21/5
- So, 90/42 + 72/35 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+72/35 90/42+72/70