Add 30/40 and 4/84
30/40 + 4/84 is 67/84.
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,
30/40 = 30 × 21/40 × 21 = 630/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
4/84 = 4 × 10/84 × 10 = 40/840 - Add the two like fractions:
630/840 + 40/840 = 630 + 40/840 = 670/840 - 670/840 simplified gives 67/84
- So, 30/40 + 4/84 = 67/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+4/84 30/40+8/84 30/80+4/84 90/40+4/84 30/40+12/84 30/40+20/84 30/40+28/84