Add 45/64 and 21/70
45/64 + 21/70 is 321/320.
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,
45/64 = 45 × 35/64 × 35 = 1575/2240 - Likewise, for the 2nd fraction, since 70 × 32 = 2240,
21/70 = 21 × 32/70 × 32 = 672/2240 - Add the two like fractions:
1575/2240 + 672/2240 = 1575 + 672/2240 = 2247/2240 - 2247/2240 simplified gives 321/320
- So, 45/64 + 21/70 = 321/320
In mixed form: 11/320
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