Add 21/48 and 42/70
21/48 + 42/70 is 83/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 70 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 48 × 35 = 1680,
21/48 = 21 × 35/48 × 35 = 735/1680 - Likewise, for the 2nd fraction, since 70 × 24 = 1680,
42/70 = 42 × 24/70 × 24 = 1008/1680 - Add the two like fractions:
735/1680 + 1008/1680 = 735 + 1008/1680 = 1743/1680 - 1743/1680 simplified gives 83/80
- So, 21/48 + 42/70 = 83/80
In mixed form: 13/80
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