Add 12/45 and 8/42
12/45 + 8/42 is 16/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
12/45 = 12 × 14/45 × 14 = 168/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
8/42 = 8 × 15/42 × 15 = 120/630 - Add the two like fractions:
168/630 + 120/630 = 168 + 120/630 = 288/630 - 288/630 simplified gives 16/35
- So, 12/45 + 8/42 = 16/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45+8/42 12/45+16/42 12/90+8/42 12/45+8/84 36/45+8/42 12/45+24/42 60/45+8/42 12/45+40/42 84/45+8/42 12/45+56/42