Add 3/40 and 45/84
3/40 + 45/84 is 171/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
3/40 = 3 × 21/40 × 21 = 63/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
45/84 = 45 × 10/84 × 10 = 450/840 - Add the two like fractions:
63/840 + 450/840 = 63 + 450/840 = 513/840 - 513/840 simplified gives 171/280
- So, 3/40 + 45/84 = 171/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40+45/84 3/40+90/84 3/80+45/84 9/40+45/84 15/40+45/84 21/40+45/84