Add 12/90 and 4/84
12/90 + 4/84 is 19/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
12/90 = 12 × 14/90 × 14 = 168/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
4/84 = 4 × 15/84 × 15 = 60/1260 - Add the two like fractions:
168/1260 + 60/1260 = 168 + 60/1260 = 228/1260 - 228/1260 simplified gives 19/105
- So, 12/90 + 4/84 = 19/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+4/84 12/90+8/84 36/90+4/84 12/90+12/84 60/90+4/84 12/90+20/84 84/90+4/84 12/90+28/84