Add 84/4 and 30/72
1st number: 21 0/4, 2nd number: 30/72
84/4 + 30/72 is 257/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 4 × 18 = 72,
84/4 = 84 × 18/4 × 18 = 1512/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Add the two like fractions:
1512/72 + 30/72 = 1512 + 30/72 = 1542/72 - 1542/72 simplified gives 257/12
- So, 84/4 + 30/72 = 257/12
In mixed form: 215/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+60/72 84/8+30/72 84/4+90/72 84/12+30/72 84/20+30/72 84/28+30/72