Add 90/40 and 75/84
1st number: 2 10/40, 2nd number: 75/84
90/40 + 75/84 is 22/7.
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,
90/40 = 90 × 21/40 × 21 = 1890/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
75/84 = 75 × 10/84 × 10 = 750/840 - Add the two like fractions:
1890/840 + 750/840 = 1890 + 750/840 = 2640/840 - 2640/840 simplified gives 22/7
- So, 90/40 + 75/84 = 22/7
In mixed form: 31/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+75/84