Add 42/90 and 75/64
1st number: 42/90, 2nd number: 1 11/64
42/90 + 75/64 is 1573/960.
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,
75/64 = 75 × 45/64 × 45 = 3375/2880 - Add the two like fractions:
1344/2880 + 3375/2880 = 1344 + 3375/2880 = 4719/2880 - 4719/2880 simplified gives 1573/960
- So, 42/90 + 75/64 = 1573/960
In mixed form: 1613/960
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+75/64