Add 24/90 and 40/42
24/90 + 40/42 is 128/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
24/90 = 24 × 7/90 × 7 = 168/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
40/42 = 40 × 15/42 × 15 = 600/630 - Add the two like fractions:
168/630 + 600/630 = 168 + 600/630 = 768/630 - 768/630 simplified gives 128/105
- So, 24/90 + 40/42 = 128/105
In mixed form: 123/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/90+40/42 24/90+80/42 24/90+40/84 72/90+40/42