Add 18/42 and 8/45
18/42 + 8/45 is 191/315.
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,
18/42 = 18 × 15/42 × 15 = 270/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
8/45 = 8 × 14/45 × 14 = 112/630 - Add the two like fractions:
270/630 + 112/630 = 270 + 112/630 = 382/630 - 382/630 simplified gives 191/315
- So, 18/42 + 8/45 = 191/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+8/45 18/42+16/45 18/84+8/45 18/42+8/90 54/42+8/45 18/42+24/45 90/42+8/45 18/42+40/45 18/42+56/45