Add 70/40 and 63/84
1st number: 1 30/40, 2nd number: 63/84
70/40 + 63/84 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
63/84 = 63 × 10/84 × 10 = 630/840 - Add the two like fractions:
1470/840 + 630/840 = 1470 + 630/840 = 2100/840 - 2100/840 simplified gives 5/2
- So, 70/40 + 63/84 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80+63/84