Add 30/40 and 1/84
30/40 + 1/84 is 16/21.
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,
1/84 = 1 × 10/84 × 10 = 10/840 - Add the two like fractions:
630/840 + 10/840 = 630 + 10/840 = 640/840 - 640/840 simplified gives 16/21
- So, 30/40 + 1/84 = 16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+1/84 30/40+2/84 30/80+1/84 90/40+1/84 30/40+3/84 30/40+5/84 30/40+7/84