Add 42/20 and 8/45
1st number: 2 2/20, 2nd number: 8/45
42/20 + 8/45 is 41/18.
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,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
8/45 = 8 × 4/45 × 4 = 32/180 - Add the two like fractions:
378/180 + 32/180 = 378 + 32/180 = 410/180 - 410/180 simplified gives 41/18
- So, 42/20 + 8/45 = 41/18
In mixed form: 25/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+8/45 42/20+16/45 42/40+8/45 42/20+8/90 42/20+24/45 42/60+8/45 42/20+40/45 42/20+56/45