Add 21/70 and 9/64
21/70 + 9/64 is 141/320.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 64 is 2240
Next, find the equivalent fraction of both fractional numbers with denominator 2240 - For the 1st fraction, since 70 × 32 = 2240,
21/70 = 21 × 32/70 × 32 = 672/2240 - Likewise, for the 2nd fraction, since 64 × 35 = 2240,
9/64 = 9 × 35/64 × 35 = 315/2240 - Add the two like fractions:
672/2240 + 315/2240 = 672 + 315/2240 = 987/2240 - 987/2240 simplified gives 141/320
- So, 21/70 + 9/64 = 141/320
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+9/64 21/70+18/64 63/70+9/64 21/70+27/64 21/70+45/64 21/70+63/64