Add 5/72 and 21/70
5/72 + 21/70 is 133/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
5/72 = 5 × 35/72 × 35 = 175/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
21/70 = 21 × 36/70 × 36 = 756/2520 - Add the two like fractions:
175/2520 + 756/2520 = 175 + 756/2520 = 931/2520 - 931/2520 simplified gives 133/360
- So, 5/72 + 21/70 = 133/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/72+21/70 5/72+42/70 15/72+21/70 5/72+63/70 25/72+21/70 35/72+21/70