Add 20/64 and 42/70
20/64 + 42/70 is 73/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 70 is 2240
Next, find the equivalent fraction of both fractional numbers with denominator 2240 - For the 1st fraction, since 64 × 35 = 2240,
20/64 = 20 × 35/64 × 35 = 700/2240 - Likewise, for the 2nd fraction, since 70 × 32 = 2240,
42/70 = 42 × 32/70 × 32 = 1344/2240 - Add the two like fractions:
700/2240 + 1344/2240 = 700 + 1344/2240 = 2044/2240 - 2044/2240 simplified gives 73/80
- So, 20/64 + 42/70 = 73/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/64+42/70 20/64+84/70 60/64+42/70