Find the reciprocal of the following: 20/51 × 4/91
Solution:
Given, 20/51 × 4/91
We have to find the reciprocal of the given expression.
20/51 × 4/91 = (20 × 4) / (51 × 91)
= 80/4641
Reciprocal means an expression which when multiplied by another expression, gives unity (1) as a result.
The reciprocal of any quantity is, one divided by that quantity.
Reciprocal of 80/4641 = 1/(80/4641)
= 4641/80
Therefore, the reciprocal is 4641/80.
✦ Try This: Find the reciprocal of the following: 1/3 × 2/5
Given, 1/3 × 2/5
We have to find the reciprocal of the given expression.
1/3 × 2/5 = (1 × 2) / (3 × 5)
= 2/15
Reciprocal of 2/15 = 1/(2/15)
= 15/2
Therefore, the reciprocal is 15/2.
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 9
NCERT Exemplar Class 7 Maths Chapter 8 Problem 86(ii)
Find the reciprocal of the following: 20/51 × 4/91
Summary:
The reciprocal of 20/51 × 4/91 is 4641/80
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