Add 21/70 and 8/60
21/70 + 8/60 is 13/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
21/70 = 21 × 6/70 × 6 = 126/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
8/60 = 8 × 7/60 × 7 = 56/420 - Add the two like fractions:
126/420 + 56/420 = 126 + 56/420 = 182/420 - 182/420 simplified gives 13/30
- So, 21/70 + 8/60 = 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+8/60 21/70+16/60 63/70+8/60 21/70+24/60 21/70+40/60 21/70+56/60