Add 21/70 and 4/20
21/70 + 4/20 is 1/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
4/20 = 4 × 7/20 × 7 = 28/140 - Add the two like fractions:
42/140 + 28/140 = 42 + 28/140 = 70/140 - 70/140 simplified gives 1/2
- So, 21/70 + 4/20 = 1/2
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