Add 42/20 and 30/72
1st number: 2 2/20, 2nd number: 30/72
42/20 + 30/72 is 151/60.
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,
30/72 = 30 × 5/72 × 5 = 150/360 - Add the two like fractions:
756/360 + 150/360 = 756 + 150/360 = 906/360 - 906/360 simplified gives 151/60
- So, 42/20 + 30/72 = 151/60
In mixed form: 231/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+30/72 42/20+60/72 42/40+30/72 42/20+90/72 42/60+30/72