Add 16/40 and 42/63
16/40 + 42/63 is 16/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
16/40 = 16 × 63/40 × 63 = 1008/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
42/63 = 42 × 40/63 × 40 = 1680/2520 - Add the two like fractions:
1008/2520 + 1680/2520 = 1008 + 1680/2520 = 2688/2520 - 2688/2520 simplified gives 16/15
- So, 16/40 + 42/63 = 16/15
In mixed form: 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/40+42/63 16/40+84/63 16/80+42/63 48/40+42/63 80/40+42/63