Solution - Adding, subtracting and finding the least common multiple
Other Ways to Solve:
Step by Step Solution
Reformatting the input :
Changes made to your input should not affect the solution:
(1): "^-21" was replaced by "^(-21)".
Step 1 :
Equation at the end of step 1 :
(720) - (7)(-21)
Step 2 :
Equation at the end of step 2 :
720 - (7)(-21)
Step 3 :
Rewriting the whole as an Equivalent Fraction :
3.1 Subtracting a fraction from a whole
Rewrite the whole as a fraction using 721 as the denominator :
720 720 • 721
720 = ——— = —————————
1 721
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole
Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator
Calculating Multipliers :
3.2 Calculate multipliers for the two fractions
Denote the Least Common Multiple by L.C.M
Denote the Left Multiplier by Left_M
Denote the Right Multiplier by Right_M
Denote the Left Deniminator by L_Deno
Denote the Right Multiplier by R_Deno
Left_M = L.C.M / L_Deno = 721
Right_M = L.C.M / R_Deno = 1
Adding fractions that have a common denominator :
3.3 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
Multiplying exponents :
720 multiplied by 721 = 7(20 + 21) = 741 720 • 721 - (1) 741 - 1 ——————————————— = ——————— 721 1
Final result :
7 - 1
—————
1
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