Add 15/40 and 8/84
15/40 + 8/84 is 79/168.
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,
15/40 = 15 × 21/40 × 21 = 315/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
8/84 = 8 × 10/84 × 10 = 80/840 - Add the two like fractions:
315/840 + 80/840 = 315 + 80/840 = 395/840 - 395/840 simplified gives 79/168
- So, 15/40 + 8/84 = 79/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+8/84 15/40+16/84 15/80+8/84 45/40+8/84 15/40+24/84 75/40+8/84 15/40+40/84 15/40+56/84