Add 21/40 and 2/35
21/40 + 2/35 is 163/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 35 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Likewise, for the 2nd fraction, since 35 × 8 = 280,
2/35 = 2 × 8/35 × 8 = 16/280 - Add the two like fractions:
147/280 + 16/280 = 147 + 16/280 = 163/280 - So, 21/40 + 2/35 = 163/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40+2/35 21/40+4/35 21/80+2/35 21/40+2/70 63/40+2/35 21/40+6/35 21/40+10/35 21/40+14/35