Add 42/20 and 3/72
1st number: 2 2/20, 2nd number: 3/72
42/20 + 3/72 is 257/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
42/20 = 42 × 18/20 × 18 = 756/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
3/72 = 3 × 5/72 × 5 = 15/360 - Add the two like fractions:
756/360 + 15/360 = 756 + 15/360 = 771/360 - 771/360 simplified gives 257/120
- So, 42/20 + 3/72 = 257/120
In mixed form: 217/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+3/72 42/20+6/72 42/40+3/72 42/20+9/72 42/60+3/72 42/20+15/72 42/20+21/72