## Subtract 90/50 from 70/20

1^{st} number: 3 10/20, 2^{nd} number: 1 40/50

70/20 - 90/50 is 17/10.

#### Steps for subtracting fractions

- Find the least common denominator or LCM of the two denominators:

LCM of 20 and 50 is **100**

Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,

70/20 = 70 × 5/20 × 5 = 350/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,

90/50 = 90 × 2/50 × 2 = 180/100 - Subtract the two like fractions:

350/100 - 180/100 = 350 - 180/100 = 170/100 - After reducing the fraction, the answer is 17/10
- In mixed form: 17/10

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