Add 70/20 and 8/45
1st number: 3 10/20, 2nd number: 8/45
70/20 + 8/45 is 331/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
8/45 = 8 × 4/45 × 4 = 32/180 - Add the two like fractions:
630/180 + 32/180 = 630 + 32/180 = 662/180 - 662/180 simplified gives 331/90
- So, 70/20 + 8/45 = 331/90
In mixed form: 361/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+16/45 70/40+8/45 70/20+8/90 70/20+24/45 70/60+8/45 70/20+40/45 70/20+56/45