Add 42/80 and 9/45
42/80 + 9/45 is 29/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
9/45 = 9 × 16/45 × 16 = 144/720 - Add the two like fractions:
378/720 + 144/720 = 378 + 144/720 = 522/720 - 522/720 simplified gives 29/40
- So, 42/80 + 9/45 = 29/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+9/45 42/80+18/45 42/80+9/90 42/80+27/45 42/80+63/45