Add 16/42 and 21/45
16/42 + 21/45 is 89/105.
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,
16/42 = 16 × 15/42 × 15 = 240/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
21/45 = 21 × 14/45 × 14 = 294/630 - Add the two like fractions:
240/630 + 294/630 = 240 + 294/630 = 534/630 - 534/630 simplified gives 89/105
- So, 16/42 + 21/45 = 89/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/42+21/45 16/42+42/45 16/84+21/45 16/42+21/90 48/42+21/45 16/42+63/45 80/42+21/45