Question

what
number should be added to get
4​

Answer 1

Answer:

Question:-

What number should be added to $\sf 5\dfrac {1}{4}$ to get $\sf 7\dfrac {2}{5}$

Answer:-

First simplify the numbers

${:}\rightarrowtail$$\sf 5\dfrac {1}{4}=\dfrac {21}{4}$

${:}\rightarrowtail$$\sf 7\dfrac {2}{5}=\dfrac {37}{5}$

• Let the number be x

ATQ ,

${:}\rightarrowtail$$\sf \dfrac {21}{4}+x=\dfrac {37}{5}$

• Simplify

${:}\rightarrowtail$$\sf x=\dfrac {37}{5}-\dfrac {21}{4}$

${:}\rightarrowtail$$\sf x=\dfrac {148-105}{20}$

${:}\rightarrowtail$$\sf x=\dfrac {43}{20}$

${:}\rightarrowtail$$\sf x=2 \dfrac {3}{20}$

$\therefore\underline{\underline{\sf 2\dfrac {3}{20}\:should\:be\:added\:to\:5\dfrac {1}{4}\;to\:get\;7\dfrac {2}{5}.}}$

Answer 2

x + 5 1/4 = 7 2/5

x = 7 2/5 - 5 1/4

x = 37/5 - 21/4

x = (148 - 105)/20

x = 43/20

x = 2 3/20