Add 20/54 and 12/45
20/54 + 12/45 is 86/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 45 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
20/54 = 20 × 5/54 × 5 = 100/270 - Likewise, for the 2nd fraction, since 45 × 6 = 270,
12/45 = 12 × 6/45 × 6 = 72/270 - Add the two like fractions:
100/270 + 72/270 = 100 + 72/270 = 172/270 - 172/270 simplified gives 86/135
- So, 20/54 + 12/45 = 86/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/54+12/45 20/54+24/45 20/54+12/90 60/54+12/45 20/54+36/45 20/54+60/45 20/54+84/45