Add 21/90 and 10/60
21/90 + 10/60 is 2/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
10/60 = 10 × 3/60 × 3 = 30/180 - Add the two like fractions:
42/180 + 30/180 = 42 + 30/180 = 72/180 - 72/180 simplified gives 2/5
- So, 21/90 + 10/60 = 2/5
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