Add 84/42 and 72/10
1st number: 2 0/42, 2nd number: 7 2/10
84/42 + 72/10 is 46/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
72/10 = 72 × 21/10 × 21 = 1512/210 - Add the two like fractions:
420/210 + 1512/210 = 420 + 1512/210 = 1932/210 - 1932/210 simplified gives 46/5
- So, 84/42 + 72/10 = 46/5
In mixed form: 91/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+72/20 84/42+72/30 84/42+72/50 84/42+72/70