Add 84/70 and 21/64
1st number: 1 14/70, 2nd number: 21/64
84/70 + 21/64 is 489/320.
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,
84/70 = 84 × 32/70 × 32 = 2688/2240 - Likewise, for the 2nd fraction, since 64 × 35 = 2240,
21/64 = 21 × 35/64 × 35 = 735/2240 - Add the two like fractions:
2688/2240 + 735/2240 = 2688 + 735/2240 = 3423/2240 - 3423/2240 simplified gives 489/320
- So, 84/70 + 21/64 = 489/320
In mixed form: 1169/320
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