Solutions by everydaycalculation.com

2136 - 121 is 1528.

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

LCM of 36 and 21 is**252**

Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,

2136 = 21 × 736 × 7 = 147252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,

121 = 1 × 1221 × 12 = 12252 - Subtract the two like fractions:

147252 - 12252 = 147 - 12252 = 135252 - After reducing the fraction, the answer is 1528

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