Add 1/81 and 12/40
1/81 + 12/40 is 253/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
1/81 = 1 × 40/81 × 40 = 40/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
12/40 = 12 × 81/40 × 81 = 972/3240 - Add the two like fractions:
40/3240 + 972/3240 = 40 + 972/3240 = 1012/3240 - 1012/3240 simplified gives 253/810
- So, 1/81 + 12/40 = 253/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81+12/40 1/81+24/40 1/81+12/80 3/81+12/40 1/81+36/40 5/81+12/40 1/81+60/40 7/81+12/40 1/81+84/40