Add 7/36 and 21/70
7/36 + 21/70 is 89/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 70 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 36 × 35 = 1260,
7/36 = 7 × 35/36 × 35 = 245/1260 - Likewise, for the 2nd fraction, since 70 × 18 = 1260,
21/70 = 21 × 18/70 × 18 = 378/1260 - Add the two like fractions:
245/1260 + 378/1260 = 245 + 378/1260 = 623/1260 - 623/1260 simplified gives 89/180
- So, 7/36 + 21/70 = 89/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/36+21/70 7/36+42/70 7/72+21/70 21/36+21/70 7/36+63/70 35/36+21/70 49/36+21/70