Adding fractions with unlike denominators ?
1 answer:
The fractions you start with have to be re-written with the same (common) denominator. For example, if you were asked to add 3/5 and 6/7, you would: 1) Identify the Lowest Common Denominator (LCD): Here it is 5*7 = 35. 2) Multiply both numerator and denom. of 3/5 by 7: 21/35 3) Mult. both num. and denom. of 6/7 by 5: 30/35 4) Combine these two equivalent fractions: 21/35 + 30/35 = 51/35 (answer) Try a few such problems yourself and write back if you need further help.
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