Add 21/75 and 84/90
21/75 + 84/90 is 91/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
21/75 = 21 × 6/75 × 6 = 126/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
84/90 = 84 × 5/90 × 5 = 420/450 - Add the two like fractions:
126/450 + 420/450 = 126 + 420/450 = 546/450 - 546/450 simplified gives 91/75
- So, 21/75 + 84/90 = 91/75
In mixed form: 116/75
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