Add 42/90 and 30/64
42/90 + 30/64 is 449/480.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 90 × 32 = 2880,
42/90 = 42 × 32/90 × 32 = 1344/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
30/64 = 30 × 45/64 × 45 = 1350/2880 - Add the two like fractions:
1344/2880 + 1350/2880 = 1344 + 1350/2880 = 2694/2880 - 2694/2880 simplified gives 449/480
- So, 42/90 + 30/64 = 449/480
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+30/64 42/90+60/64 42/90+90/64