Add 72/30 and 75/40
1st number: 2 12/30, 2nd number: 1 35/40
72/30 + 75/40 is 171/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
72/30 = 72 × 4/30 × 4 = 288/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
75/40 = 75 × 3/40 × 3 = 225/120 - Add the two like fractions:
288/120 + 225/120 = 288 + 225/120 = 513/120 - 513/120 simplified gives 171/40
- So, 72/30 + 75/40 = 171/40
In mixed form: 411/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/60+75/40 72/30+75/80 72/90+75/40