Add 8/42 and 84/45
1st number: 8/42, 2nd number: 1 39/45
8/42 + 84/45 is 72/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
8/42 = 8 × 15/42 × 15 = 120/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
84/45 = 84 × 14/45 × 14 = 1176/630 - Add the two like fractions:
120/630 + 1176/630 = 120 + 1176/630 = 1296/630 - 1296/630 simplified gives 72/35
- So, 8/42 + 84/45 = 72/35
In mixed form: 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+84/45 8/84+84/45 8/42+84/90 24/42+84/45 40/42+84/45 56/42+84/45