Add 12/63 and 40/42
12/63 + 40/42 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
12/63 = 12 × 2/63 × 2 = 24/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
40/42 = 40 × 3/42 × 3 = 120/126 - Add the two like fractions:
24/126 + 120/126 = 24 + 120/126 = 144/126 - 144/126 simplified gives 8/7
- So, 12/63 + 40/42 = 8/7
In mixed form: 11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63+40/42 12/63+80/42 12/63+40/84 36/63+40/42 60/63+40/42 84/63+40/42