Subtract 24/50 from 81/90, Solve 81/90

Subtract 24/50 from 81/90

81/90 - 24/50 is 21/50.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 90 × 5 = 450,
81/90 = 81 × 5/90 × 5 = 405/450
Likewise, for the 2nd fraction, since 50 × 9 = 450,
24/50 = 24 × 9/50 × 9 = 216/450
Subtract the two like fractions:
405/450 - 216/450 = 405 - 216/450 = 189/450
After reducing the fraction, the answer is 21/50

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