Add 21/72 and 8/30
21/72 + 8/30 is 67/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 30 × 12 = 360,
8/30 = 8 × 12/30 × 12 = 96/360 - Add the two like fractions:
105/360 + 96/360 = 105 + 96/360 = 201/360 - 201/360 simplified gives 67/120
- So, 21/72 + 8/30 = 67/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72+8/30 21/72+16/30 21/72+8/60 63/72+8/30 21/72+24/30 21/72+8/90 21/72+40/30 21/72+56/30