Add 70/84 and 75/63
1st number: 70/84, 2nd number: 1 12/63
70/84 + 75/63 is 85/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
70/84 = 70 × 3/84 × 3 = 210/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
75/63 = 75 × 4/63 × 4 = 300/252 - Add the two like fractions:
210/252 + 300/252 = 210 + 300/252 = 510/252 - 510/252 simplified gives 85/42
- So, 70/84 + 75/63 = 85/42
In mixed form: 21/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: