Add 48/40 and 3/21
1st number: 1 8/40, 2nd number: 3/21
48/40 + 3/21 is 47/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
48/40 = 48 × 21/40 × 21 = 1008/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
3/21 = 3 × 40/21 × 40 = 120/840 - Add the two like fractions:
1008/840 + 120/840 = 1008 + 120/840 = 1128/840 - 1128/840 simplified gives 47/35
- So, 48/40 + 3/21 = 47/35
In mixed form: 112/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/40+3/21 48/40+6/21 48/80+3/21 48/40+3/42 48/40+9/21 48/40+3/63 48/40+15/21