Add 70/90 and 63/40
1st number: 70/90, 2nd number: 1 23/40
70/90 + 63/40 is 847/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
70/90 = 70 × 4/90 × 4 = 280/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
63/40 = 63 × 9/40 × 9 = 567/360 - Add the two like fractions:
280/360 + 567/360 = 280 + 567/360 = 847/360 - So, 70/90 + 63/40 = 847/360
In mixed form: 2127/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+63/80