Add 42/72 and 1/45
42/72 + 1/45 is 109/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 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 45 × 8 = 360,
1/45 = 1 × 8/45 × 8 = 8/360 - Add the two like fractions:
210/360 + 8/360 = 210 + 8/360 = 218/360 - 218/360 simplified gives 109/180
- So, 42/72 + 1/45 = 109/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+1/45 42/72+2/45 42/72+1/90 42/72+3/45 42/72+5/45 42/72+7/45