Add 4/90 and 40/42
4/90 + 40/42 is 314/315.
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,
4/90 = 4 × 7/90 × 7 = 28/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
40/42 = 40 × 15/42 × 15 = 600/630 - Add the two like fractions:
28/630 + 600/630 = 28 + 600/630 = 628/630 - 628/630 simplified gives 314/315
- So, 4/90 + 40/42 = 314/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+40/42 4/90+80/42 4/90+40/84 12/90+40/42 20/90+40/42 28/90+40/42