Add 48/40 and 9/21
1st number: 1 8/40, 2nd number: 9/21
48/40 + 9/21 is 57/35.
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,
9/21 = 9 × 40/21 × 40 = 360/840 - Add the two like fractions:
1008/840 + 360/840 = 1008 + 360/840 = 1368/840 - 1368/840 simplified gives 57/35
- So, 48/40 + 9/21 = 57/35
In mixed form: 122/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/40+9/21 48/40+18/21 48/80+9/21 48/40+9/42 48/40+27/21 48/40+9/63 48/40+45/21 48/40+63/21