Add 16/40 and 63/42
1st number: 16/40, 2nd number: 1 21/42
16/40 + 63/42 is 19/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
16/40 = 16 × 21/40 × 21 = 336/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
63/42 = 63 × 20/42 × 20 = 1260/840 - Add the two like fractions:
336/840 + 1260/840 = 336 + 1260/840 = 1596/840 - 1596/840 simplified gives 19/10
- So, 16/40 + 63/42 = 19/10
In mixed form: 19/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/40+63/42 16/80+63/42 16/40+63/84 48/40+63/42 80/40+63/42