Add 20/42 and 16/45
20/42 + 16/45 is 262/315.
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,
20/42 = 20 × 15/42 × 15 = 300/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
16/45 = 16 × 14/45 × 14 = 224/630 - Add the two like fractions:
300/630 + 224/630 = 300 + 224/630 = 524/630 - 524/630 simplified gives 262/315
- So, 20/42 + 16/45 = 262/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+16/45 20/42+32/45 20/84+16/45 20/42+16/90 60/42+16/45 20/42+48/45 20/42+80/45