Add 28/40 and 12/64
28/40 + 12/64 is 71/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 64 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 40 × 8 = 320,
28/40 = 28 × 8/40 × 8 = 224/320 - Likewise, for the 2nd fraction, since 64 × 5 = 320,
12/64 = 12 × 5/64 × 5 = 60/320 - Add the two like fractions:
224/320 + 60/320 = 224 + 60/320 = 284/320 - 284/320 simplified gives 71/80
- So, 28/40 + 12/64 = 71/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+12/64 28/40+24/64 28/80+12/64 84/40+12/64 28/40+36/64 28/40+60/64 28/40+84/64