Add 42/72 and 21/35
42/72 + 21/35 is 71/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 35 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
42/72 = 42 × 35/72 × 35 = 1470/2520 - Likewise, for the 2nd fraction, since 35 × 72 = 2520,
21/35 = 21 × 72/35 × 72 = 1512/2520 - Add the two like fractions:
1470/2520 + 1512/2520 = 1470 + 1512/2520 = 2982/2520 - 2982/2520 simplified gives 71/60
- So, 42/72 + 21/35 = 71/60
In mixed form: 111/60
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