Add 90/8 and 40/42
1st number: 11 2/8, 2nd number: 40/42
90/8 + 40/42 is 1025/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
90/8 = 90 × 21/8 × 21 = 1890/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
40/42 = 40 × 4/42 × 4 = 160/168 - Add the two like fractions:
1890/168 + 160/168 = 1890 + 160/168 = 2050/168 - 2050/168 simplified gives 1025/84
- So, 90/8 + 40/42 = 1025/84
In mixed form: 1217/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/8+80/42 90/16+40/42 90/8+40/84 90/24+40/42 90/40+40/42 90/56+40/42