Add 42/72 and 5/90
42/72 + 5/90 is 23/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
5/90 = 5 × 4/90 × 4 = 20/360 - Add the two like fractions:
210/360 + 20/360 = 210 + 20/360 = 230/360 - 230/360 simplified gives 23/36
- So, 42/72 + 5/90 = 23/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+5/90 42/72+10/90 42/72+15/90 42/72+25/90 42/72+35/90