Add 4/90 and 42/56
4/90 + 42/56 is 143/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
4/90 = 4 × 28/90 × 28 = 112/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
42/56 = 42 × 45/56 × 45 = 1890/2520 - Add the two like fractions:
112/2520 + 1890/2520 = 112 + 1890/2520 = 2002/2520 - 2002/2520 simplified gives 143/180
- So, 4/90 + 42/56 = 143/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+42/56 4/90+84/56 12/90+42/56 20/90+42/56 28/90+42/56